Question

how many individual atoms are present in one unit of sodium sulfate, na₂so₄?
a) 7
b) 2
c) 4
d) 1

Explanation:

Step1: Identify atom - types and counts

In $Na_2SO_4$, there are 2 sodium (Na) atoms, 1 sulfur (S) atom, and 4 oxygen (O) atoms.

Step2: Calculate total atom count

Total atoms = 2 (Na) + 1 (S)+ 4 (O) = 7.

Answer:

A. 7