Question

please provide valencies of elements .​

Answer 1

SI 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

51 Antimony -3, +3, (+4), +5

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

53 Iodine -1, +1, (+3), (+4), +5, +7

54 Xenon 0

55 Cesium +1

56 Barium +2

57 Lanthanum +3

58 Cerium +3, +4

59 Praseodymium +3

60 Neodymium +3, +4

61 Promethium +3

62 Samarium (+2), +3

63 Europium (+2), +3

64 Gadolinium +3

65 Terbium +3, +4

66 Dysprosium +3

67 Holmium +3

68 Erbium +3

69 Thulium (+2), +3

70 Ytterbium (+2), +3

71 Lutetium +3

72 Hafnium +4

73 Tantalum (+3), (+4), +5

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

75 Rhenium (-1), (+1), +2, (+3), +4, (+5), +6, +7

76 Osmium (+2), +3, +4, +6, +8

77 Iridium (+1), (+2), +3, +4, +6

78 Platinum (+1), +2, (+3), +4, +6

79 Gold +1, (+2), +3

80 Mercury +1, +2

81 Thallium +1, (+2), +3

82 Lead +2, +4

83 Bismuth (-3), (+2), +3, (+4), (+5)

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

85 Astatine ?

86 Radon 0

87 Francium ?

88 Radium +2

89 Actinium +3

90 Thorium +4

91 Protactinium +5

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

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