Question

2) An element has its electronic configuration 2,8,8, 2. Answer the
following questions.
1) What is the atomic number of this element?
ii) What is the group of this element?
iii) What is the valency of this element ?
iv) To which period does this element belongs ?
v) With which of the following elements would this element resemble ?
„N, 18 Ar, Be, 1, C1​

Answer 1

Answer:

i) 20

ii)2nd group

iii)+2

iv)4th period

v)Be

Answer 2

Answer:

1) according to

A=p=e

A=20=e

2) I think that element is calcium and its group is 2A

3)2± see last electron in valance shell

4)period 3 I think see preodic table

5)only negative ones that is N C Be