Question

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Q10. The following data represents the distribution of electrons, protons and neutrons in atoms of four elements A, B, C, D.

Element	Protons	Neutrons	Electrons
A B C D	19 17 17 18	21 18 20 22	19 17 17 18

Answer the following questions :-

(i) Describe the electronic distribution in atom of element B.

(ii) Is elements B a metal or a now-metal ? Why ?

Answer 1

Dear student,
a) Element B has 17 electrons. So the distribution is as follows:
[B] = 2 , 8 , 7
K, L, M
b) Since element B is having 7 electrons in the outermost shell , it will gain an electron results in formation of anion. So the element is a NON METAL i.e. CHLORINE.
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