write down the valence electron and valency of first thirty elements.

Asked by Prachi Panwar | 8th Jun, 2013, 05:52: PM

Expert Answer:

Z

 

Symbol

 

Electronic Configuration

 

Valence electrons

Valencies

 

 

 

 

 

 

 

 

 

1

 

H

 

1s1

 

1

(-1), +1

 

2

He

1s2

2

0

 

3

Li

[He] 2s1

1

+1

 

4

Be

[He] 2s2

2

+2

 

5

B

[He] 2s2 2p1

3

-3, +3

 

6

C

[He] 2s2 2p2

4

(+2), +4

 

7

N

[He] 2s2 2p3

5

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

 

8

O

[He] 2s2 2p4

6

-2

 

9

F

[He] 2s2 2p5

7

-1, (+1)

 

10

Ne

[He] 2s2 2p6

8

0

 

11

Na

[Ne] 3s1

1

+1

 

12

Mg

[Ne] 3s2

2

+2

 

13

Al

[Ne] 3s2 3p1

3

+3

 

14

Si

[Ne] 3s2 3p2

4

-4, (+2), +4

 

15

P

[Ne] 3s2 3p3

5

-3, +1, +3, +5

 

16

S

[Ne]3s2 3p4

6

-2, +2, +4, +6

 

17

Cl

[Ne] 3s2 3p5

7

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

 

18

Ar

[Ne] 3s2 3p6

8

0

 

19

K

[Ar] 4s1

1

+1

 

20

Ca

[Ar] 4s2

2

+2

 

21

Sc

[Ar] 3d1 4s2

3

+3

 

22

Ti

[Ar] 3d2 4s2

4

+2, +3, +4

 

23

V

[Ar] 3d3 4s2

5

+2, +3, +4, +5

 

24

Cr

[Ar] 3d5 4s1

6

+2, +3, +6

 

25

Mn

[Ar] 3d5 4s2

7

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

 

26

Fe

[Ar] 3d6 4s2

8

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

 

27

Co

[Ar] 3d7 4s2

9

+2, +3, (+4)

 

28

Ni

[Ar] 3d8 4s2

10

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

 

29

Cu

[Ar] 3d10 4s1

11

+1, +2, (+3)

 

30

Zn

[Ar] 3d10 4s2

12

+2

 

 

Answered by  | 9th Jun, 2013, 01:42: PM

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