Question

What will be the symbolic representation of the following statement?
2 atoms of phosphorous and 7 atoms of oxygen

• A. $P{O}_7$
• B. $P_2{O}_5$
• C. $P_2{O}_7$
• D. $P{O}_4$

Answer 1

Answer: (C)

$P_2{O}_7$

There are two atoms of phosphorous and seven atoms of phosphorous. Therefore, the subscript for phosphorous is 2 and for oxygen is 7. So the formula is $P_2{O}_7$.