Question

A. Magnesium and Fluorine

b. Sodium and Fluorine
c. Sodium and Oxygen
d. Aluminium and Iodine
2. Write the chemical formula using the 4-step method for:
a) Magnesium sulphide,
b) Magnesium Fluoride,
c) Hydrogen Bromide and
d) Iron (III) Oxide.

Answer 1

1)
a. MgF₂

b. NaF

c. Na₂O

d. AlI₃

2)

a. MgS

b. MgF₂

c. HBr

d. Fe₂O₃