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CBSE Class 10 Answered

I want to know Calcium has 2,8,8,2 whereas next element Scandium has 2,8,9,2.How is this possible,I couldn't understand.Please say with respect to Valency shells.
Asked by RAHUL rd | 02 Mar, 2015, 12:00: PM
Expert Answer

Atomic No.

Element

K

L

M

N

O

P

 

 

1

2

3

4

5

6

 

 

s

s p

s p d

s p d f

s p d f

s p d f

20

Ca

2

2 6

2 6 -

2

 

 

21

Sc

2

2 6

2 6 1

2

 

 

Answered by Vaibhav Chavan | 02 Mar, 2015, 06:07: PM
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