If the electronic configurations of atoms A and B are `1S^2,2S^2, 2P^6,3S^2, 3P^1` and `2s2, 2p6 3S^2,3P^4` respectively, then What is the valency of atom A?

If the electronic configurations of atoms A and B are 3S^2,2S^2, 2P^6,3S^2, 3P^1 and 2, 6 1S^2,2P^4 respectively, then Which atom forms positive ion?

If the electronic configurations of atoms A and B are 1s^2 , 2s^2 , 2p^6 , 3s^2 , 3p^1 ' and 1s^2 , 2s^2 , 2p^4 respectively, then What is the molecular formula of the compound formed by atoms A and B ?

If the electronic configurations of atoms A and B are 1s^2 , 2s^2 , 2p^6 , 3s^2 , 3p^1 ' and 1s^2 , 2s^2 , 2p^4 respectively, then Which atom forms negative ion ?

The electronic configuration of an atom is as follows 1s^2,2s^2,2p^2 . Which element's atom is it ?

Which element has electronic configuration of 1s^2 2s^2 2p^6 ?

Electronic configuration of an element is 1s^2 2s^2 2p^6 3s^2 3p^6 3d^5 4s^1 . It belongs to

The element whose electronic configuration is 1s^2 2s^2 2p^5 is

The electronic configuration of an element is 1s^2 2s^2 2p^5 . It is most likely to form

The electronic configuration 1s^2 2s^6 2p^6 3s^2 3p^4 represents

The electronic configuration of an atom is as follows 1s^2,2s^2,2p^2 . Which orbital is the last electron in ?