Lesson 2: Atomic Chemistry

Engage

What do you think the difference between these three images is?
(See Below)

Write your idea down, then we will watch a video to confirm your preconceptions.

After watching the video what is the difference?

An Atom (Revsion)

We know atoms are the fundemental unit of matter.

They are made from: 

1. Protons

2. Neutrons

3. Electrons

Elements

Last lesson we learnt that the number of protons determines the element.

An element is an atom with a particular amount of protons

If we change the number of protons we change the element.

Ions

Ions are charged atoms.

If you add or remove electrons or protons to an atom you can make them ions.

If ions have more protons than electrons they are positively charged.

• These are called cations

If ions have more electrons than protons they are negatively charged.

• These are called anions

Isotopes

Isotopes are atoms of the same element with different masses.

This is because the amount of protons is the same but the number of neutrons is different

If you add or remove protons you change the mass of the element and make it an isotope.