Q43 of 149 Page 192

An element has atomic number 13 and an atomic mass of 27.

(a) How many electrons are there in each atom of the element?


(b) How are these electrons distributed in the various energy levels?

(a) In each atom of an element the no. of electron is 13.

(b) These electrons distributed in the various energy levels like K-2, L-8, M-3. Its electronic configuration is 2, 8, 3.


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