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There are 7 electrons in the 3rd shell o...

There are 7 electrons in the 3rd shell of an element.
a. Write its subshell electronic configuration.
Find the block and group in which this element is included.

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`a) 1s^2 2s^2 2p^6 3s^2 3p^5`
b) Group - 17, Block - P
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V PUBLICATION-PERIODIC TABLE AND ELECTRONIC CONFIGURATION-QUESTION BANK
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