Common formulae
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Last updated 7:59 PM on 10/2/25
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33 Terms
1
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H₂
hydrogen
2
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N₂
nitrogen
3
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O₂
oxygen
4
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F₂
fluorine
5
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Cl₂
chlorine
6
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Br₂
bromine
7
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I₂
iodine
8
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P₄
phosphorus
9
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S₈
sulphur
10
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CO₂
carbon dioxide
11
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CO
carbon monoxide
12
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NO
nitrogen monoxide
13
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NO₂
nitrogen dioxide
14
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SO₂
sulphur dioxide
15
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SO₃
sulphur trioxide
16
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NH₄
ammonia
17
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CH₄
methane
18
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H₂S
hydrogen sulphide
19
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HCl
hydrogen chloride
20
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H₂SO₄
sulfuric acid
21
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HNO₃
nitric acid
22
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H₃PO₄
phosphoric acid
23
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NO₃⁻
nitrate
24
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SO₄²⁺
sulphate
25
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CO₃²⁻
carbonate
26
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HCO₃⁻
hydrocarbonate
27
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OH⁻
hydroxide
28
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H⁻
hydride
29
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PO₄³⁻
phosphate
30
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ZN²⁺
zinc (II) ion
31
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NH₄⁺
ammonium
32
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H⁺
hydrogen ion
33
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Ag⁺
silver (I) ion
