Find out atomic number, group, block period using subshell electronic configuration and then complete the table.
Subshell electronic configuration 
Atomic number 
Group 
Block 
Period 
1s^{2}2s^{2}2p^{6} 




1s^{2}2s^{2}2p^{6}3s^{1} 




1s^{2}2s^{2}2p^{6}3s^{2}3p^{2}3d^{5}4s^{1} 





25 




28 




26 


