The Atom

Question 1

Describe the subatomic particles

Answer 1

Protons are heavy and positive
Neutrons are heavy and neutral
Electrons are very light and are negatively charged

Protons have a relative mass of 1
Neutrons have a relative mass of 1
Electrons have a relative mass of 0.0005

Question 2

What are some facts about the nucleus?

Answer 2

It’s in the middle
It contains Protons and neutrons 
It has a positive charge because of the protons 
Almost all the mass is in the nucleus 
The nucleus is tiny

Question 3

What are some facts about the electrons?

Answer 3

Electrons move around the nucleus in electron shells
They are negative
They’re tiny but cover a lot of space
The shells determine the size of the atom
Electrons have tiny mass

Question 4

What is the atomic and mass number ?

Answer 4

Atomic number = how many protons an atoms has

Mass number = total number of protons and neutrons in the atom combined