Give the periods and blocks to which each of the following elements belong?
`""_(13)Al` ii) `""_(24)Cr` ii) `""_(29)Cu` iv) `""_(11)Na`

Explanation

`""_(13)Al=1s^(2),2s^(2),2p^(6),3s^(2),3p^(1)` (3rd period and p-block)
ii) `""_(24)Cr=1s^(2),2s^(2),2p^(6),3s^(2),4s^(1),3d^(5)` (4th period and d-block)
iii) `""_(29)Cu=1s^(2),2s^(2),2p^(6),3s^(2),3p^(6),4s^(1),3d^(10)` (4th period and d-block )
iv) `""_(11)Na=1s^(2),2s^(2),2p^(6),3s^(1)` (3rd period and s-block )