elements in the periodic table are listed in order of their -----​

Answers

Answer 1

Answer:

In numerical order left to right, they are arranged by the number of protons in the nucleus of a single atom of each element

Answer 2

Answer:They are in order of their increasing atomic number


Related Questions

identify the color for each of the ph ranges for bromothymol blue.

Answers

The pH ranges for bromothymol blue are: pH 6.0 or less: Yellow, pH 6.0 to 6.8: Green, pH 6.8 to 7.6: Blue, pH 7.6 to 8.4: Greenish-Blue, pH 8.4 to 9.6: Blue-Green, and pH 9.6 or higher: Blue.

Bromothymol blue is a pH indicator that changes color over a pH range of 6.0 to 7.6. At pH 6.0, the color of the solution turns yellow, indicating an acidic solution. At pH 7.6, the color of the solution turns blue, indicating a basic solution.

The pH range between 6.0 and 7.6 is considered neutral, so the color of the solution is green. A solution with a pH of exactly 7.0 will appear green when bromothymol blue is added to it. As the pH of the solution changes, the color of the solution will change as well, providing an easy way to determine the pH of a solution.

The color changes that occur with the use of bromothymol blue can be used to determine the acidity or basicity of solutions. The use of pH indicators like bromothymol blue is important in many areas of science, including medicine, biology, and environmental science.

For example, in medicine, the pH of blood is important to determine the health of the individual. Blood has a pH range of 7.35-7.45, and pH indicators like bromothymol blue can be used to determine if blood pH is within the normal range.

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If Kc = 0.042 for PCl3 (g) + Cl2 (g) ———-> PCl5 (g) at 500 K, what is the value of Kp for this reaction at this temperature?

Answers

Answer:

no answer

Explanation:

you can get the answer If you go back to your textbook

Match the term to the correct definition.

Match the term to the correct definition.

Answers

Answer:

Vitamin ----- Organic Compounds.Minerals ----- Inorganic Compounds .

Answer:
minerals >>> inorganic
vitamins >>> organic

Explanation:
vitamins are made by plant or animals making them organic substance
minerals haven’t been bonded with carbon and cannot bring life to a cell making them inorganic

hope this helped :)

which of the following compounds have integer i values? (select all that apply.) which of the following compounds have integer i values? (select all that apply.) kcl ch3cooh na2co3 hclo4

Answers

The following compounds have integer i values:KClNa2CO3

The following compounds have integer i values: KCl and Na2CO3.

i stands for van't Hoff factor and is the number of particles formed from one solute molecule in a solution.

An i value of 1 means that no particles are produced upon solvation or that the solute molecule exists independently in the solvent.

Conversely, an i value greater than one indicates that one molecule of solute produces more than one particle in the solvent. This includes molecules that dissociate into ions, form complexes, or exist in a solvent as aggregates.

It is worth noting that the i value is an experimentally derived value and may not necessarily be an integer.

According to the question, the following compounds have integer i values:KClNa2CO3

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Calculate the percent by mass of a solution made from 14 g nacl (the solute) and 71 g water.

Answers

The percent by mass of NaCl in the solution is approximately 16.47%.

To calculate the percent by mass of a solution, you need to determine the mass of the solute (NaCl) and the mass of the entire solution (NaCl + water). Here's how you can calculate it:

Mass of NaCl = 14 g

Mass of water = 71 g

Total mass of the solution = Mass of NaCl + Mass of water = 14 g + 71 g = 85 g

Now, you can calculate the percent by mass of NaCl in the solution:

Percent by mass of NaCl = (Mass of NaCl / Total mass of the solution) * 100

Percent by mass of NaCl = (14 g / 85 g) * 100

Percent by mass of NaCl = 16.47%

Therefore, the percent by mass of NaCl in the solution is approximately 16.47%.

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What happen when battery plus steel wool

Answers

Answer:

It catches fire

Explanation:

Answer:

Touching the battery to steel wool sends a current through the thin wire, and it heats up a lot (to about 700 degrees C).

have a nice day! (^o^)

ASAP will give brainliest!!!
Which of the following solid substances contains positive ions immersed in a sea of mobile electrons?

Your answer:

O2

Cu

CuO

NO2

Answers

Answer:

For me

Explanation:

It's Cu because other compound contains negative radicals

What does the identity of an element depend on the number of?
A. protons in the atom
B. electrons in the atom
C. protons and neutrons in the nucleus
D. neutrons in the atom

Answers

Answer: A. protons in the atom

Explanation: I just took the test and got a 100% so this should be right. Unless the question is worded differently than mine then it should be right. Hope this helps :)

Answer:

A

Explanation:

what is a substance combination of different atoms?

Answers

Every combination of atoms is a molecule. A compound is a molecule made of atoms from different elements. All compounds are molecules, but not all molecules are compounds

Answer:

Brainliest-

Explanation:

plz help meh, I think there is trick question!!!

plz help meh, I think there is trick question!!!
plz help meh, I think there is trick question!!!

Answers

Answer:

Explanation:

Atoms of each element contain a characteristic number of protons. In fact, the number of protons determines what atom we are looking at (all atoms with six protons are carbon atoms), the number of protons in an atom is called the atomic number. In contrast, the number of neutrons for a given element can vary.

I hope I helped you!

Answer:

Atoms of each element contain a characteristic number of protons. In fact, the number of protons determines what atom we are looking at (e.g., all atoms with six protons are carbon atoms); the number of protons in an atom is called the atomic number. In contrast, the number of neutrons for a given element can vary.

Explanation:

So i would say C

Which statement provides the best example of a scientific conclusion?
O A. Graphite can be used to make pencils.
O B. Diamond is mined in South Africa
O C. Diamond and graphite are both composed of carbon.
D. Diamond jewelry is prettier than graphite jewelry.​

Answers

Answer:

c

Explanation:

In science, there is always processing of an item or sample to get an end product. So if the diamond is mined; there is a processing stage used to come out with the final product as Diamond through carbon in the heating process

What type of boundary exists along the coast of California?

Answers

Answer:

I exist ;-;

Explanation:

discharge by the combination of Nitrogen and oxygen​

Answers

Answer:

NO2

Explanation:

N = Nitrogen

O = Oxygen

Answer:

NO. 2.

is the answer

hopes this helps

mcpba draw one of the two diasteromers of the major product from this reaction use wedge and dash bonds to indicate sterochemistry where appropriate ignore inorganic byproducts

Answers

A molecule's three-dimensional structure, with simple lines representing plane links, wedge-shaped lines representing bonds facing the observer, and dashed lines representing bonds Stereochemistry facing the viewer's opposite.

Stereochemistry is the study of a molecule's three-dimensional structure. The only structural difference between cis and trans isomers, which are types of stereoisomers, is where the molecule's elements are located three dimensionally. The chemical and physical properties of these stereoisomers may differ. Stereochemistry is a branch of chemistry concerned with "the study of the various spatial configurations of atoms in molecules." The systematic presentation of a specific area of science and technology, known as

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Plz help

A student determines that the mass of a metal rod
is 12.0 g. He places 10.0 mL of water in a 25 ml
graduated cylinder. When the metal rod is placed
in the water, the graduated cylinder then reads
15,0 mL. What is the density of the metal rod?

Answers

Answer:

Explanation:

There's a great many assumptions in this question. We have to assume  that the rod was completely immersed. We also have to note that we can read the volumes to 3 places accurately. School graduated cylinders are not that accurate.

Leaving those objections aside,  here is how the question should be done.

Final volume = 15.0 mL

Initial volume = 10.0 mL

Water displaced = 5.0 mL

The amount of water displaced is the same as the volume of the metal rod.

Finally the mass of the rod is 12.0 grams.

Density = mass / volume

Density = 12.0 grams / 5.0 mL

density= 2.4 grams / mL   a mL and a cc^3 are the same thing.

density = 2.4 grams / cc^3

With regard to tonicity, two solutions that have the same concentrations of nondiffusible solutes and water are said to be?

Answers

Any external solution that contains the same amounts of solutes or water as biological fluids is seen to be isotonic. The flow of water inside an isotonic solution won't be net.

Which fatty acids are present in nature Mcq most frequently?

The 16- or 18-carbon fatty acids, also known as palmitic acid or stearic acid, respectively, are among the most widely dispersed fatty acids. The bulk of organisms' lipids contain both and stearic acids. In animals, up to 30% of body fat is made up of palmitic acid.

What is the fatty acid's Mcq solubility in water?

Water only partially dissolves fatty acids. The hydrophilic COOH group just at end of the hydrocarbon chain is what causes the partial solubility. The hydrocarbon chains cannot be dissolved at all in water.

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What will the effect be on the resolution and Rf values in the following situations? (paper chromatography experiment)

a) The watch glass is left off the beaker during the run
b) The chromatogram was left in the beaker too long so that the solvent front went all the way to the top of the paper in 5 minutes before the paper was removed
c) The spots were too big
d) A student used a shorter piece of chromatographic paper

Answers

Chromatography is primarily used as a method for the analysis and separation of chemical mixtures. Chromatography is the process of causing the constituent parts of a mixture to migrate differently from a restricted starting point in a particular medium, in this case, filter paper.

A) The air pressure above the beaker would disrupt the flow of the spots through the TLC, resulting in less resolution on the TLC plate, if the watch glass is not kept above the beaker for running paper chromatography. Despots would look, and even swarm, as a result.

B) The solvent is not allowed to move completely through the TLC plate because if the chromatogram is left in the beaker for a long time so that the solvent completely flows to the top, all of the spots would reach the solvent front and we would be unable to distinguish between the spots present in the TLC plate.

C). The TLC spotting should be performed in a very minute manner. Assume that if this substance is quite thick and a few of spots are seen apart, the TLC plate would drag and the resolution would be thrown off. As a result, it is challenging to tell the spots apart.

D). If the chromatographic paper is very short, it will be difficult to distinguish between the spots because, if more than one spot is present in a given compound, it will be harder to determine how many spots there are if there is a smaller distance between them. The TLC sheet's shorter length is the cause of the decreased space between the supports. Therefore, it is preferable to avoid using this longer TLC sheet so that the resolution is high and the spots can be easily identified.

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how are the foram fossils from the two time periods different?

Answers

Answer:

here are several resons that fossil foraminifera are especially valuable for determining the relative ages of marine rock layers. They have been around since the Cambrian, over 500 million years ago. They show fairly continuous evolutionary development, so different species are found at different times.

Atoms lose, gain, or share valence electrons to satisfy ________.

Options
1.Hund’s Rule
2.The rule of Nines
3.the Heisenburg Uncertainty Principle
4.the Octet Rule

Answers

The Octet Rule requires all atoms in a molecule to have 8 valence electrons--either by sharing, losing or gaining electrons--to become stable. For Covalent bonds, atoms tend to share their electrons with each other to satisfy the Octet Rule.

For the reaction 2NH3(g)↽−−⇀3H2(g)+N2(g) 2 NH 3 ( g ) ↽ − − ⇀ 3 H 2 ( g ) + N 2 ( g ) the equilibrium concentrations were found to be [NH3]=0.250 M, [ NH 3 ] = 0.250 M, [H2]=0.300 M, [ H 2 ] = 0.300 M, and [N2]=0.750 M. [ N 2 ] = 0.750 M. What is the equilibrium constant for this reaction? c= K c =

Answers

Answer:

0.324

Explanation:

The following data were obtained from the question:

Concentration of NH3, [NH3] = 0.25 M

Concentration of H2, [H2] = 0.3 M

Concentration of N2, [N2] = 0.75 M

Equilibrium constant (Kc) =.?

The balanced equation for the reaction is given below:

2NH3 <==> 3H2 + N2

The equilibrium constant, Kc for a given reaction is the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient. Thus, the equilibrium constant for the above reaction can be obtained as illustrated below:

Kc = [H2]³ [N2] / [NH3]²

Concentration of NH3, [NH3] = 0.25 M

Concentration of H2, [H2] = 0.3 M

Concentration of N2, [N2] = 0.75 M

Equilibrium constant (Kc) =.?

Kc = [H2]³ [N2] / [NH3]²

Kc = [0.3]³ × [0.75] / [0.25]²

Kc = (0.027 × 0.75) / 0.0625

Kc = 0.02025 / 0.0625

Kc = 0.324

Therefore, the equilibrium constant for the reaction is 0.324

you will be rewarded with the necessary items to make your S'morel
If we were to add a piece of solid Cu to an aqueous solution of silver
nitrate, the Silver would be replaced in a single replacement reaction
forming aqueous copper (I) nitrate and solid silver. How much silver is
produced is 15.00 gramps of Cu is added to the solution of excess silver
nitrate? Show al work and don't forget to use significant figures.

Answers

50.9 grams of Cu are added to the excess silver nitrate solution.

What is molar mass?

The molar mass of a chemical compound is defined in chemistry as the ratio between the mass and amount of substance in any sample of said compound. The molar mass of a substance is a bulk property, not a molecular property. A substance's molar mass is the mass in grams of one mole of the compound. A mole is the number of entities present in a substance, such as atoms, molecules, or ions. A mole of any substance is defined as 6.022*10^23 molecules.

Here,

moles =  mass÷  molar mass

molar mass of Cu = 63.5 g/mol

moles = 15.00 g÷ 63.5 g/mol

= 0.236  moles

moles of Ag   =0.236  

moles  x 2/1 =0.472  moles

mass = moles x molar mass

the molar mass of Ag =107.87 g/mol

mass  = 0.472  moles x 107.87 g/mol = 50.9 g

50.9 grams of Cu is added to the solution of excess silver nitrate.

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When European demand for a certain solvent declined, Dow Chemical instructed its German plant to switch to manufacturing a chemical that had been imported from Louisiana and Texas. Dow Chemical would be best described as a(n)

Answers

Dow Chemical would be best described as a multinational corporation in this scenario.

What is a Multinational corporation?

This is the type of corporation which are involved in controlling production of goods and services in at least one country different from that of residence.

Dow chemical is known to have a plant in Germany and Russia thereby making it a multinational corporation.

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Zn + I2 ---> Znl2
Determine the theoretical yield of the product if 2g of Zn is used

Answers

Answer:

Mass = 9.58 g

Explanation:

Given data:

Mass of Zn = 2g

Theoretical yield of ZnI₂ = ?

Solution:

Chemical equation:

Zn + I₂       →     ZnI₂

Number of moles of Zn:

Number of moles = mass/molar mass

Number of moles = 2g / 65.38 g/mol

Number of moles = 0.03 mol

Now we will compare the moles of Zn and ZnI₂.

                   Zn           :          ZnI₂

                    1             :           1

                  0.03        :         0.03

Mass of ZnI₂:

Mass = number of moles × molar mass

Mass = 0.03 mol × 319.22 g/mol

Mass = 9.58 g

Based on the scientific sources you found, did you think one person’s points were more scientifically valid than the other’s

Answers

What is research? Depending on who you ask, you will likely get very different answers to this seemingly innocuous question. Some people will say that they routinely research different online websites to find the best place to buy goods or services they want. Television news channels supposedly conduct research in the form of viewer polls on topics of public interest such as forthcoming elections or government-funded projects. Undergraduate students research the Internet to find the information they need to complete assigned projects or term papers. Graduate students working on research projects for a professor may see research as collecting or analyzing data related to their project. Businesses and consultants research different potential solutions to remedy organizational problems such as a supply chain bottleneck or to identify customer purchase patterns. However, none of the above can be considered “scientific research” unless: (1) it contributes to a body of science, and (2) it follows the scientific method. This chapter will examine what these terms mean

Answer:

Yes. The scientific sources disputed several of the fitness instructor’s points. For example, he mentioned that GMO foods cause food allergies, but two credible sources disputed this claim. The lab technician, however, supported her findings with verifiable scientific information.

Explanation: plato

as air surfaces the earth warms the density of the air

Answers

When air surfaces the earth, the density of the air warms up. This is because the earth surface heats up the air by the process of convection. As the sun's radiation reaches the earth, the earth's surface absorbs it and in turn, heats the surrounding air molecules.

These molecules then rise as they become less dense than the cooler air around them. This warm air then moves upwards and away from the surface of the earth, allowing cooler air to take its place.The heating of the air surface affects the air density, which causes the air to expand. When the air is warmed up, it becomes less dense, and its molecules move farther apart. The opposite happens when the air cools down, and its density increases. As the air becomes less dense, it rises, and the cooler, denser air flows in to replace it.

The warming up of the earth's air surface due to the sun's radiation has a significant effect on weather patterns and global climate change. It is one of the reasons why the earth's temperature is increasing, and this increase in temperature has a range of implications, including rising sea levels, melting ice caps, and more frequent extreme weather events.

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What final product is obtained when 2,8-nonanone is treated with base, followed by reaction with sodium borohydride?

Answers

Sodium borohydride decomposed by water to form sodium hydroxide, a corrosive material, and hydrogen, a flammable gas. The appearance of sodium borohydride is white to grayish crystalline powder.

The heat of this reaction may adequate to ignite the hydrogen. The material itself is easily ignited and burns powerfully once ignited.

Great reducing agent.

According to question,

When 2,8 nonaone is treated with base it gives 4 methy, 4 hydroxy oct-2-one and when it followed by the NaBH4 (Sodium Boro hydride) it gives methyl, 1,7 di hydroxy octane.

Hence the final product obtained is methyl, 1,7 di hydroxy octane.

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how many grams of h2 are needed to produce 12.51 g of nh3?

Answers

Total, 18.765 grams of hydrogen gas are needed to produce 12.51 grams of NH₃.

To determine the amount of H₂ needed to produce a given mass of NH₃, we need to use the balanced chemical equation for the reaction between H₂ and NH₃. The balanced equation is:

3H₂ + N₂ → 2NH₃

From the equation, we can see that 3 moles of H₂ react to form 2 moles of NH₃.

Now, we need to calculate the molar masses of H₂ and NH₃;

The molar mass of H₂ is 2 g/mol (1 g/mol for each hydrogen atom).

The molar mass of NH₃ is approximately 17 g/mol (1 g/mol for each hydrogen atom and 14 g/mol for nitrogen).

To find the amount of H₂ needed, we can set up a proportion using the molar ratios from the balanced equation:

(3 mol H₂ / 2 mol NH₃) = (x g H₂ / 12.51 g NH₃)

Cross-multiplying and solving for x (the mass of H₂), we get:

x = (3 mol H₂ / 2 mol NH₃) × (12.51 g NH₃)

x ≈ 18.765 g H₂

Therefore, approximately 18.765 grams of H₂ are needed to produce 12.51 grams of NH₃.

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1. A student in lab measures 4.6 grams of copper for an experiment. Upon further analysis he determines that he should have measured out 4.7 grams of copper. What is his percent error?

Answers

Answer:

\(2.13\%\)

Explanation:

Quantity of copper measured by a student = 4.6 grams

Original quantity of copper = 4.7 grams

Error in measurement = Original quantity of copper - Quantity of copper measured by a student  \(=4.7-4.6=0.1\) grams

To find the percent error, apply the following formula:

Percent error = (Error in measurement / Original quantity of copper) × 100

\(=\frac{0.1}{4.7}(100)=2.13\%\)

Consider the following saturated solution of calcium hydroxide.


Ca(OH)2 (s) + Ca(aq) + 2OH(aq)


What effects, if any, will adding Cl have on the position of equilibrium?


A) shifts to product side


B) shifts to reactant side


C) will increase the concentration of Ca(OH)2 (8)


D) None

Answers

The addition of Cl to a saturated solution of calcium hydroxide will not have any effect on the position of equilibrium because it is a spectator ion and does not participate in the solubility of Ca(OH)2 is determined by the concentration of these ions in solution.

At equilibrium, the concentration of these ions determines the solubility of Ca(OH)2. The addition of Cl to the solution does not affect the concentration of Ca2+ or OH- ions because Cl is a spectator ion and does not participate in the reaction.the concentration of Cl-, which will shift the equilibrium the formation of Ca(OH)2 (s) nd decreasing the concentration of Ca2+ and OH- ions in solution.  in a saturated solution of Ca(OH)2, the concentration of Ca2+ and OH- ions is already at its maximum.

the following saturated solution of calcium hydroxide: Ca(OH)2 (s) + Ca(aq) + 2OH(aq) In the given reaction, Cl is not involved, so adding Cl will not directly affect the concentrations of the reactants or products. Since the position of the equilibrium depends on the concentrations of the involved species, the equilibrium will not shift in any direction or change the concentration of Ca(OH)2.

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The equilibrium is based solely on the solubility of Ca(OH)2 in water, and adding Cl will not change this. Therefore, the correct answer is D) None.

Adding Cl to the saturated solution of calcium hydroxide will have no effect on the position of equilibrium. This is because Cl is not a reactant or product in the equation and does not affect the concentration of either Ca or OH ions. The added Cl− ion (common-ion) interferes with the equilibrium by raising the concentration of the Cl− ion. According to Le Chatelier's principle the reverse reaction speeds up as it tries to reduce the effect of the added Cl−. As a result the equilibrium position shifts to the left.

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what are the features of a standard hydrogen electrode? a temperature of 298 k a carbon electrode hydrogen gas at 1.01 x 10^5 pa (1 atm) pressure

Answers

The features of a standard hydrogen electrode are :

1. Temperature of 298 K (25°C)

2. Carbon electrode

3. Hydrogen gas at 1.01 x 10^5 Pa (1 atm) pressure

4. Electrolyte solution containing a hydrogen ion activity of 1 mol/L

5. Platinum wire as the current collector

6. A Potential of 0.00 V (relative to the hydrogen gas)

These features are what make up the Standard Hydrogen Electrode (SHE). The temperature of 298 K is the temperature at which the SHE is calibrated and is the standard temperature used in most laboratory experiments. The carbon electrode serves as the interface between the hydrogen gas and the electrolyte, and the hydrogen gas is held at 1.01 x 10^5 Pa (1 atm) pressure. The electrolyte solution contains a hydrogen ion activity of 1 mol/L, which is necessary for the electrode to function properly. A platinum wire is used as the current collector, and the electrode has a potential of 0.00 V, relative to the hydrogen gas. All of these features are necessary for the SHE to function properly and for the electrode to serve as the reference for all other electrochemical measurements.

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