Which of the following configurations represent the elemnet in the ground and which in the excited state ? Name the element in each case :
(i) `1s^(2) 2s^(1) 2p^(1)` (ii) `1s^(2) 2s^(2) 2p^(1) 2p^(1)` (ii) `1s^(2) 2s^(2) 2p^(1)` (iii) `1s^(2)2s^(1) 2p_(x)^(1) 2p_(y)^(1) 2p_(z)^(1)` (iv) `1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p_(x)^(1)3p_(y)^(1)3p_(z)^(1) 3d^(1)`
