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Ca (2+), P (5+), O(2-)
H(1+), O(2-) , N(5+)
Mg(2+), S(2-)
b) H(1+), Cl (7+), O(2-)
Si ( 4+), O(2-)
H(1+), Br (1-)
Na(1+), H (1-)
C) Zn (2+), O(2-), C(4+)
H(1+), O(2-) , S(6+)
O(2-), Mn (7+)
2.
2+
7+
4+
6+
2+