Inside an Atom

• Science
• Lower Secondary (Key Stage 3)

Inside an Atom

How many protons does this atom have?

1. 3
2. 4

How many electrons does this atom have?

1. 2
2. 3

How many neutrons does this atom have?

1. 5
2. 6

Match the charge to the subatomic particle.

Electrons are

Protons are

Neutrons are 

Negative

Neutral

Positive

Compare the numbers of each subatomic particle in this atom.

What colour are the protons in this atom? How do you know?

Atoms have an equal number of protons and electrons.

1. True
2. False

Electrons are positively charged.

1. True
2. False

The nucleus orbits the electrons.

1. True
2. False

Protons are positively charged.

1. True
2. False

Neutrons have no charge.

1. True
2. False

1. Attract
2. Repel

1. Attract
2. Repel

1. Attract
2. Repel

Predict the charge on the other balloon.

1. Positive
2. Negative

Predict the charge on the other balloon.

1. Positive
2. Negative