M
e
t
a
1
S
Li¹+
Na ¹+
K¹+
Be2+
Mg2+
Ca²+
F¹-
LiF
Br¹-
It
B²
ILi Br
O
2-
Li₂O
Non-Metals
S²-
It say
L₂S
MgO
K₂S
N³-
P³-
1¹-
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