Atoms, elements and compounds S1

A pure substance...

• is an element or a compound
• is an element or a mixture
• is a compound or a mixture
• is a mixture

1 A substance made up of two or more chemically combined elements is —

• an element

• mixture

• compound

• solution

Hydrogen

• Hy

• H

• Hr

• Hn

Iron

• Ir

• In

• Fe

• FE

Potassium

• P

• K

• Pt

• k

Which is the following is a compound?

• Nitrogen

• Carbon dioxide

• Aluminium

• Sodium

The center of the atom.

Has protons + neutrons.

• neutron

• nucleus

• electron

• atom

Has a positive charge.

Found in the nucleus.

• neutron

• electron

• nucleus

• proton

Has a negative charge.

Found OUTSIDE of the nucleus.

• proton

• neutron

• electron

• nucleus

Has no charge ( neutral ).

Found in the nucleus.

• proton

• neutron

• electron

• nucleus