Atoms and Elements

Question 1

What does the nucleus contain?

Answer 1

Protons and neutrons.

Question 2

Where are the electrons in a atom?

Answer 2

occupying shells around the nucleus.

Question 3

What are the charges of protons, neutrons and electrons?

Answer 3

Protons are positively charged
Neutrons are neutral
Electrons are negatively charged

Question 4

If a atom has 16 protons how many electrons does it have and why?

Answer 4

It has 16 electrons because the number of protons also equals the number of electrons (they’re the same amount)

Question 5

How many electrons can fit in the 1st, 2nd and 3rd shells of an atom

Answer 5

1st = 2
2nd = 8
3rd = 8

Question 6

Why do atoms react?

Answer 6

Atoms react because they want to have a full outer shell, like noble gases. So they react with other atoms to try to fill their outer shell.

Question 7

If magnesium has a proton number of 12, it has 12 electrons. So what’s it’s electronic structure?

Answer 7

2,8,2

Question 8

If potassium has a proton number of 19, it has 19 electrons. So what’s it’s electronic structure?

Answer 8

2,8,8,1

Question 9

Approximately how many atoms are found naturally on earth?

Answer 9

100