Respuesta :
It is the first one. Be is an alkali earth metal, so its charge is 2+, while phosphate has a 3- charge, making it answer 1.
The correct formula for Beryllium phosphate is Be3(PO4)2
Beryllium has a charge of +2 and phosphate has a charge of -3. So to make the charge equal to zero, 3x +2 = 6, and 2 x-3 = -6
-6 + +6 = 0