1
Q
Sulfate
A
SO₄²⁻
2
Q
Aluminium
A
Al³⁺
3
Q
Ammonium
A
NH₄⁺
4
Q
Barium
A
Ba²⁺
5
Q
Beryllium
A
Be²⁺
6
Q
Bromide
A
Br⁻
7
Q
Calcium
A
Ca²⁺
8
Q
Carbonate
A
CO₃²⁻
9
Q
Chloride
A
Cl⁻
10
Q
Fluoride
A
F⁻
11
Q
Hydride
A
H⁻
12
Q
Hydrogen
A
H⁺
13
Q
Hydroxide
A
OH⁻
14
Q
Lead
A
Pb²⁺
15
Q
Nitrate
A
NO₃⁻
16
Q
Zinc
A
Zn²⁺
17
Q
Silver
A
Ag⁺
18
Q
Sodium
A
Na⁺
19
Q
Potassium
A
K⁺
20
Q
Magnesium
A
Mg²⁺
21
Q
Lithium
A
Li⁺
22
Q
Manganate (VII)
A
MnO₄⁻
23
Q
Dichromate(VI)
A
Cr₂O₇²⁻
24
Q
Nitride
A
N³⁻
25
Oxide
O²⁻
26
Sulfide
S²⁻
27
Boron
B³⁺
28
Phosphate
PO₄³⁻
O level Chemistry
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