4 3
5
16
7
89
How many atoms are there in
0.5 mol of Fe?
3.01 x 1023
6.02 x 1023
26
120 X 1024
-r notes

Phosphorous can form an ion called phosphide, which has the formula p3−. this ion can form an ion called phosphide, which has the formula p3−. this ion properties very similar to those of pforms when a phosphorus atom loses three protonsis called a cationcontains 18 electrons