Predict the periods and blocks to which each of the following elements belongs ?
(i) `_(13)Al`
(ii) `_(24)Cr`
(iii) `_(29)Cu`
(iv) `_(11)Na`

Explanation

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