Chemical Ions, Molecules, and Acids: Key Definitions for Chemistry

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Last updated 8:47 AM on 5/17/26

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53 Terms

1

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Hydrogen ion

H+

2

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Lithium ion

Li+

3

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Sodium ion

Na+

4

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Potassium ion

K+

5

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Silver ion

Ag+

6

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Ammonium ion

NH4+

7

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Magnesium ion

Mg2+

8

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Calcium ion

Ca2+

9

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Strontium ion

Sr2+

10

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Barium ion

Ba2+

11

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Copper (II) ion

Cu2+

12

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Iron (II) ion

Fe2+

13

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Lead (II) ion

Pb2+

14

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Zinc (II) ion

Zn2+

15

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Nickel (II) ion

Ni2+

16

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Manganese (II) ion

Mn2+

17

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Aluminium ion

Al3+

18

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Iron (III) ion

Fe3+

19

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Fluoride

F-

20

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Chloride

Cl-

21

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Bromide

Br-

22

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Iodide

I-

23

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Hydroxide

OH-

24

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Nitrate

NO3-

25

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Ethanoate (acetate)

CH3COO-

26

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Oxide

O2-

27

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Sulfide

S2-

28

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Carbonate

CO32-

29

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Sulfate

SO42-

30

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Nitride

N3-

31

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Phosphide

P3-

32

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Phosphate

PO43-

33

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Water

H2O

34

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Carbon dioxide

CO2

35

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Methane

CH4

36

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Ozone

O3

37

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Glucose

C6H12O6

38

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Hydrogen gas

H2

39

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Oxygen gas

O2

40

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Nitrogen gas

N2

41

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Fluorine gas

F2

42

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Chlorine gas

Cl2

43

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Bromine liquid

Br2

44

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Iodine solid

I2

45

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Ammonia

NH3

46

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Hydrogen peroxide

H2O2

47

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Hydrochloric acid

HCl

48

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Nitric acid

HNO3

49

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Sulfuric acid

H2SO4

50

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Carbonic acid

H2CO3

51

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Phosphoric acid

H3PO4

52

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Ethanoic acid

CH3COOH

53

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Sulfurous acid

H2SO3