1. What is the definition of an element?

a) A mixture of different atoms
b) A simple substance made up of only one type of atom
c) A compound formed by chemical bonds
d) A substance with a giant lattice structure

2. Which of the following is the correct symbol for bromine?

a) BR
b) br
c) Br
d) bR

3. A is formed when 2 or more different elements combine.

4. What happens to the properties of elements when they chemically combine to form compounds?

a) The properties remain the same
b) The properties become slightly altered
c) The properties change significantly
d) The properties become magnetic

5. An bond is formed in compounds containing metal and non-metal ions.

6. A is a small group atoms.

7. What type of structure do ionic compounds have?

a) Molecular structure
b) Giant ionic lattice
c) Amorphous structure
d) Atomic structure

8. Based on its name which of the following compounds contains oxygen?

a) Sodium chloride
b) Lithium nitride
c) Calcium fluoride
d) Calcium carbonate

9. In the word equation: iron(s) + sulfur(s) → iron sulfide(s); what are the reactants?

a) Iron and sulfur
b) Iron sulfide
c) Iron and iron sulfide
d) Sulfur and iron sulfide

10. Ionic compounds have different and types of chemical which is why they have different properties.