Chemistry, asked by xtylishqueen17, 11 months ago

explain third period contains 8 elements but 4th period contains 18 elements​

Answers

Answered by pmukherjee1102
0

Answer:

In the third period only those elements go in whose balance shell is 'M' shell. Or those elements which have only three shells. But after 8 electrons go in to the third shell, the next one goes to the 4th shell. 4s orbital is of lower energy than of 3d.

Explanation:

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