CBSE Class 9 Answered

Number

Element

Valence

1

Hydrogen

(-1), +1

2

Helium

0

3

Lithium

+1

4

Beryllium

+2

5

Boron

-3, +3

6

Carbon

(+2), +4

7

Nitrogen

-3, -2, -1, (+1), +2, +3, +4, +5

8

Oxygen

-2

9

Fluorine

-1, (+1)

10

Neon

0

11

Sodium

+1

12

Magnesium

+2

13

Aluminum

+3

14

Silicon

-4, (+2), +4

15

Phosphorus

-3, +1, +3, +5

16

Sulfur

-2, +2, +4, +6

17

Chlorine

-1, +1, (+2), +3, (+4), +5, +7

18

Argon

0

19

Potassium

+1

20

Calcium

+2

21

Scandium

+3

22

Titanium

+2, +3, +4

23

Vanadium

+2, +3, +4, +5

24

Chromium

+2, +3, +6

25

Manganese

+2, (+3), +4, (+6), +7

26

Iron

+2, +3, (+4), (+6)

27

Cobalt

+2, +3, (+4)

28

Nickel

(+1), +2, (+3), (+4)

29

Copper

+1, +2, (+3)

30

Zinc

+2

31

Gallium

(+2). +3

32

Germanium

-4, +2, +4

33

Arsenic

-3, (+2), +3, +5

34

Selenium

-2, (+2), +4, +6

35

Bromine

-1, +1, (+3), (+4), +5

36

Krypton

0

37

Rubidium

+1

38

Strontium

+2

39

Yttrium

+3

40

Zirconium

(+2), (+3), +4

41

Niobium

(+2), +3, (+4), +5

42

Molybdenum

(+2), +3, (+4), (+5), +6

43

Technetium

+6

44

Ruthenium

(+2), +3, +4, (+6), (+7), +8

45

Rhodium

(+2), (+3), +4, (+6)

46

Palladium

+2, +4, (+6)

47

Silver

+1, (+2), (+3)

48

Cadmium

(+1), +2

49

Indium

(+1), (+2), +3

50

Tin

+2, +4