Question

An element has a tomic
number 20. Where would
you expect this element
on the Perodic table
and why?​

Answer 1

Answer:

The element having atomic number 20 is placed in the Group IIA and 4th period of the periodic table.

hope it will help u

Answer 2

Answer:

2nd group 4th period

inert gas atic numbers are

2, 10 ,18 ,36,54,86 etc are noble gas which are in 18 th group

so given is 20 which is 2 numbers after 18

so 2 nd group

also it comes after 3 rd number 18 so period is 4