Question

element u, v,w,x,y,z has atomic number 11,12,14,16,17,18 find its period ​

Answer 1

Answer:

The electronic configuration of the element with atomic number 12 is 1s22s22p63s2.

The number of valence electrons =2, which means it belongs to group II A.

The valence shell is 3, which means it belongs to the third period.

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Answer 2

Answer:

3rd period

Explanation:

element is from 1st group

then

1st group is H,Li,Na,....

so it is 3rd period