Question

plz answer .....

How does the electronic configuration in atoms change ?

( i ) in a period from left to right .

( ii ) in a group top to bottom .
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Answer 1

1-the no. if valence electrons increases when move from left to right in a period thus electronic configuration will have more electrons and more shells.

2- while in a group the no if ekectrons remains same for all elements so electronic configuration for all elements remains same.

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