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How to find period and group …

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How to find period and group in a periodic table using electronic configuration??

Posted by Nithara K 5 years ago

CBSE > Class 10 > Science

2 answers

Shubham Gupta 5 years ago

The elements has no. Of shells occurs that's the period of that one atom

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Dhhruv Dj 5 years ago

First take the Atomic number of the given element. Then calculate the electronic configuration using the atomic number 2+8+7=17 therefore the electronic configuration will be 2, 8, 7. Here we find that the no. of valence electrons of element is 7 as the valence shell has 7 electrons.

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Posted by Pandey Ji 5 months, 3 weeks ago

CBSE > Class 10 > Science