Question

the ratio of na to o is 2:1. what is the chemical formula for this ionic compound?
nao
nao₂
na₂o
na₂o₂

Explanation:

Step1: Analyze the ratio of elements

The ratio of Na to O is given as 2:1. In a chemical formula, the sub - scripts represent the ratio of atoms of each element in the compound.

Step2: Check each option

• For NaO: The ratio of Na to O is 1:1.
• For NaO₂: The ratio of Na to O is 1:2.
• For Na₂O: The ratio of Na to O is 2:1.
• For Na₂O₂: The ratio of Na to O is 1:1.

Answer:

Na₂O