Question

(a) What are valence electrons? Where are valence electrons situated in an atom?
​(b) What is the number of valence electrons in the atoms of an element having atomic number 13? Name the valence shell of this atom.

Answer 1

Answer:

(a) Valence electron is present in outermost shell of atom

(b)Valence electron =3,Valence shell is 'L'

Answer 2

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(a)The outermost shell electrons in an atom is called valence electrons.

It is situated in outermost shell .

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(b)3 is the number of valence electrons having atomic number 13.The valence shell of this atom is M.

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