Question

VALENCY OF ELEMENT 51 to 75

Answer 1

Answer:

open ur 11 chemistry ncert it is given their or download ebook from ncert.nic.in

Answer 2

Answer:

antimony (Sb) to Rhenium(Re)

Explanation:

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