Question

The electronic configuration of an element is given as 2,8,18, 7. Which period and group does this element belong? ​

Answer 1

Answer:

2belongs to K shell,8 belongs to L shell,18 belongs to M shell,7 belongs to N shell.

Explanation:

pls mark my answer as a brainliest

Answer 2

$\huge\boxed{\fcolorbox{black}{cyan}{answer}}$

Since 'X' has three energy shells and period number of an element is equal to the number of energy shells, X belongs to 4rd period.