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2 years ago

How many electrons are in a neutral carbon-14 atom?.

Chemistry

1 answer:

Alla [95]2 years ago

7 0

Answer:

There are six electrons in a carbon-14.

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What do helium (He), neon (Ne), and argon (Ar) have in common?

IrinaK [193]

Answer:

The answer is: D

Explanation:

A. They have the same number of electron energy shells. Is false, all the elements are in different periods so, they have different number of lectron energy shells.

B. They are all Halogens. No, is wrong, halogens are F, Cl ,Br

C. They have the same number of electrons. is wrong, if they had the same number of electrons they must be they same element and they aren't the same.

D. They are all Noble gases. Yes, it's true they are noble gases, they are the first group in the periodic table from the right.

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3 years ago

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there are 125 lima beans 56 garbanzo beans 39 kidney beans and 144 green peas in a container. find the percent by number of gree

Sauron [17]

39.6% of the beans are green beans

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3 years ago

Which of the following best explains what happens when the kinetic energy of particles in a liquid state increases?

klio [65]

They move fast enough to overcome the forces of attraction that hold them together, becoming a gas.

ITS THAT :)

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3 years ago

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If a hydrogen atom and a helium atom have the same kinetic energy:________

Nuetrik [128]

Answer: If a hydrogen atom and a helium atom have the same kinetic energy then the wavelength of the hydrogen atom will be roughly equal to the wavelength of the helium atom.

Explanation:

The relation between energy and wavelength is as follows.

$E = \frac{hc}{\lambda}\\$

This means that energy is inversely proportional to wavelength.

As it is given that energy of a hydrogen atom and a helium atom is same.

Let us assume that $E_{hydrogen} = E_{helium} = E'$ . Hence, relation between their wavelengths will be calculated as follows.

$E_{hydrogen} = \frac{hc}{\lambda_{hydrogen}}$ ... (1)

$E_{helium} = \frac{hc}{\lambda_{helium}}$ ... (2)

Equating the equations (1) and (2) as follows.

$E_{hydrogen} = E_{helium} = E'\\\frac{hc}{\lambda_{hydrogen}} = \frac{hc}{\lambda_{helium}} = E'\\\lambda_{helium} = \lambda_{hydrogen} = E'$

Thus, we can conclude that if a hydrogen atom and a helium atom have the same kinetic energy then the wavelength of the hydrogen atom will be roughly equal to the wavelength of the helium atom.

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3 years ago

What prevents the gravity of the sun to pull all of the planets towards it?(1 point)

GuDViN [60]

The planets speed as they orbit the sun

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2 years ago

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