Year 9 Chemistry Revision

What is an atom?

How many subatomic particles are there? Name them.

Alpha Decay occurs

• Spontaneously

• When an atom loses an electron.

• During the formation of a chemical compound.

Which of the following is not a compound?

• CaCO3

• HCl

• HNO3

• C60

A mixture is

• Two or more atoms joined together.

• Two or more atom chemically bound.

• Two or more atoms that are not chemically bound and do not create a new substance.

• Two or more atoms in the same container.

Atoms are the building block of

• The Universe

• Mars

• Earth

• Life

Name three groups on the Periodic Table.

What is the definition of Half-Life?

What is a radioisotope?

Name 1 use for radioisotopes.