Add HCl _(aq), filter off the solid barium chloride.

Add HCl _(aq), filter off the solid magnesium chloride.

Add H₂SO_{4 (aq)}, filter off the solid barium sulphate.

Add H₂SO_{4 (aq)}, filter off the solid magnesium sulphate.

They are more massive than protons and electrons

They have no electrical charge

They are less massive than protons and electrons

Protons and electrons exist in atomic nuclei; neutrons orbit the nuclei in a “cloud”

The electrons orbital gets larger

The nucleus gets heavier

There are more electrons

More neutrons are needed for stability

He discovered that every atoms was positively charged

He discovered that every element consisted of one type of atom

He discovered that atoms had nuclei

He discovered that atoms could be divided into smaller parts

Number of protons in an atom.

Number of neutron in an atom.

Mass of an atom.

Charge on an atom

Proton

Nucleus

Electron

Neutron

the number of protons

the number of protons and neutrons

the number of neutrons

the number of protons and electrons

the number of protons

the number of protons and neutrons

the number of neutrons

the number of protons and electrons

A charged atom

An atom with different amounts of neutrons

An atom with different amounts of protons

A neutral atom

different masses

different atomic numbers

different electrons

different protons