1.

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?

Answer»

(a) There will be 13 electrons in each atom of the element. Because in a neutral atom, number of protons is equal to the number of electrons. 

(b) Electronic configuration of given element (2, 8, 3) is 

K= 2 

L=8 

M=3



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