Subject :NSO Class : Class 9
A cation M and an anion N have the following composition:
M and N form a compound with formula M3N2. p, q, r and s are respectively ________.
A11, 12, 13, 28
B10, 11, 13, 27
C13, 11, 12, 25
D10, 11, 13, 28
i didnt get this ques how sodium will gain 3 electrons