Section 1 - Atomic Structure

Question 1

Which part of an atom contains almost all of the mass of the atom?

Answer 1

Nucleus

Question 2

What is the nucleus’ overall charge?

Answer 2

Positive

Question 3

Why does the nucleus’ positive charge arise?

Answer 3

Each of the protons in the nucleus have a +1 charge

Question 4

Electrons are much smaller/larger and lighter/heavier than either the neutrons or protons

Answer 4

Smaller and lighter

Question 5

What charge do electrons have?

Answer 5

Negative charge, -1

Question 6

There’s an __________ between the protons in the nucleus and the electrons in the shells

Answer 6

attraction

Question 7

The _________ occupied by the shells of the electrons determines the size of the atom

Answer 7

volume

Question 8

What is the relative mass of a proton?

Answer 8

1

Question 9

What is the relative mass of a neutron?

Answer 9

1

Question 10

What is the relative mass of an electron?

Answer 10

1/2000

Question 11

What is the overall charge of an atom?

Answer 11

0

Question 12

Why is the overall charge of an atom 0?

Answer 12

This is because each +1 charge from a proton in the nucleus is cancelled out by a -1 charge from an electron.

Question 13

Why is a positive ion positively charged?

Answer 13

It contains more protons than electrons. This means it would have lost electrons.