What is the name of this ion?

Can someone help

phosphate ion

Explanation:

it is a negatively charged ions having atoms of phosphorus and Oxygen .

collectively known as phosphate ion.

35.50 atomic mass

Explanation:

1. Multiplicate each isotope mass by its abundance

35 uma x 75% = 26.25 amu

37.01 uma x 25% = 9.2525 amu

2.  Add the values

26.25 +  9.2525  = 35.50 atomic mass