Physics, asked by BrainlyHelper, 1 year ago

Find the period and group of the element whose atomic number is 20

Answers

Answered by Anonymous
1
The element is Calcium...

Its period number is 4 
Its group number is 2
Answered by prmkulk1978
1
Very Good question .

Atomic number of element is 20.
Element name is calcium .
Electronic configuration     --------  1s2 2s2 2p6 3s2 3p6 4s2
Number of valence electrons : 2

So,
Element belongs to 4th  period.
 and Group 2
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