The electronic configuration of three elements X, Y and Z are: `X:2` `Y:2,8,7` `Z:2,8,2`
Channel: Doubtnut
Date: 2020-01-28

The electronic configuration of three elements X, Y and Z are: `X:2` `Y:2,8,7` `Z:2,8,2` Which of the following is correct regarding these elements?