The subshell electronic configuration of an element is 1s2 2s2 2p6 3s2 a. write the atomic no of this element b. identify the block group and period of this element

The subshell electronic configuration of an element is 1s2 2s2 2p6 3s2

1.	The subshell electronic configuration of an element is 1s2 2s2 2p6 3s2 a. write the atomic no of this element b. identify the block group and period of this element
Answer» (NA,) SodiumExplanation:Group=1Period=3