Question

Two elements x 17 and y 20
1) which period x and y belong
2) which group x and y belong
3)find the no of electron x and y
4)whose atomic size is greater
5) write metals and non metal

Answer 1

Answer:

1)X -3rd period

  Y - 2nd period

2) X - 17th group

 Y - 2nd group

3) X - 17 electrons

   Y - 20 electrons

4) Y

5) X- Non metal

  Y - Metal

X is Chlorine while Y is Calcium.

Hope it helps.