Question

1. identify use a periodic table and the chemical formula for the cleaning compound borax (na₂b₄o₇) to complete the table.

symbol	element	number of atoms
b
o

Explanation:

Step1: Analyze sodium (Na) atoms

In $Na_2B_4O_7$, the sub - script of Na is 2, so there are 2 Na atoms.

Step2: Analyze boron (B) atoms

The sub - script of B is 4, so there are 4 B atoms.

Step3: Analyze oxygen (O) atoms

The sub - script of O is 7, so there are 7 O atoms.

Answer:

Symbol	Element	Number of Atoms
B	Boron	4
O	Oxygen	7