Yr 9 Chemistry RE-CAP

Question 1

Atomic Structure

Answer 1

The atom is made of three subatomic particles:
- Protons (+), found in nucleus, heavy.
- Neutrons (no charge), found in nucleus, heavy.
- Electrons (-), they orbit the nucleus, and are light.

Question 2

What determines the type of Atom?

Answer 2

The number of protons

Question 3

What determines the mass of an atom

Answer 3

The number of protons and neutrons

Question 4

What determines the net charge of an atom?

Answer 4

The ration of protons to electrons

Question 5

What determines the stability of an atom?

Answer 5

The ratio of neutrons to protons

Question 6

Isotopes

Answer 6

Isotopes are atoms of the same element (same no. of protons) that have a different number of neutrons.

Question 7

Cation

Answer 7

A positive Ion

Question 8

Anion

Answer 8

A negative ion

Question 9

Ion

Answer 9

An ion is an atom or molecule that has gained or lost electrons, giving it a positive or negative charge.

Question 10

Electron Shell Maximum Layout

Answer 10

2,8,8,32