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Elodia [21]
3 years ago
15

Rutherford proposed that atoms have positive nuclei. Which statement correctly describes the nucleus of an atom?

Chemistry
2 answers:
kondor19780726 [428]3 years ago
7 0
I think that The answer is B
Gwar [14]3 years ago
3 0

Which statement correctly describes the nucleus of the atom?

The nucleus of the atom contains the electrons.The nucleus of the atom is mostly empty space.The nucleus of the atom surrounds the center of the atom.<span>The nucleus of the atom contains most of the mass of an atom.
</span>the answer is D                              
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Select the answer which shows the correct order, slowest to fastest, of the relative rate of diffusion of the gases.
IrinaK [193]

Diffusion is the process of a substance spreading out to evenly fill its container or environment. Rate of diffusion of a gas is inversely proportional to the molar mass of the gas.

Rate of diffusion \propto \frac{1}{Molar mass}

Lighter(lower) the molar mass of the gas , faster will be its rate of diffusion and heavier (higher) the molar mass of the gas , slower will be its rate of diffusion.

We have to arrange the given gases from slowest rate of diffusion to fastest rate of diffusion that means we need to arrange gases from higher molar mass to lower molar mass.

Molar mass of given gases are :

Cl = 35.5 g/mol

Xe = 131.29 g/mol

He = 4.00 g/mol

N = 14.00 g/mol

So correct order for slowest rate of diffusion (highest molar mass) to fastest rate of diffusion (lowest molar mass) is :

Xe , Cl , N , He

Xe having the highest molar mass will have the slowest rate of diffusion and He with lowest molar mass will have the fastest rate of diffusion, so option 'c' is correct.

Note : Slowest rate of diffusion = High Molar Mass

Fastest rate of diffusion = Low Molar Mass



7 0
4 years ago
What is the highest occupied energy level for an atom of copper (Cu)? *
bonufazy [111]

Answer:

third energy level - 18

hope this helps

8 0
3 years ago
How many atoms do I have if I have 2 moles of Hydrogen atoms?
maw [93]

Answer: 6

Explanation: if you multiply the number of moles in the hydrogen atoms by the number of the once displayed and you multiply it by 3 and get the answer 6

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3 years ago
What is the relationship between metals and the number of electrons in the outer level?
gayaneshka [121]
Elements in group 1-2, 13-18, the number of valence electrons is related to the group number. For example, in the first group, the alkali metals there is one valence electron, however in group 13, there are 3 valence electrons. Valence electrons are also known as the outershell electrons.
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Which of the following is not conserved in a chemical reaction?
mixer [17]
Mass is not conserved in chemical reactions. Mass is therefore never conserved because a little of it turns into energy in every reaction
6 0
2 years ago
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