172k views
4 votes
Which polyatomic ion has a charge of 3-?(1) chromate ion (2) oxalate ion (3) phosphate ion (4) thiocyanate ion

2 Answers

3 votes
(3) the Phosphate ion has a charge of 3-.

\text{PO}_4^(-3)
User ShahidAzim
by
6.7k points
0 votes

Answer: (3) phosphate ion

Explanation: A polyatomic ion is a ion which contains different atoms.

1) Chromate ion is a polyatomic ion containing chromium and oxygen with formula
CrO_4^(2-)

2) Oxalate ion is a polyatomic ion containing carbon and oxygen with formula
C_2O_4^(2-)

3) Phosphate ion is a polyatomic ion containing phosphorous and oxygen with formula
PO_4^(3-)

4) Thiocyanate ion is a polyatomic ion containing sulfur, carbon and nitrogen with formula
SCN^(-)


User Ho
by
6.9k points