Give a reason to explain why :

(a) isotopes of an element show identical chemical properties?

(b) the atomic masses of elements are in fractions ?

(c) atoms combine with other atoms ?

Ans. (a) Since all the isotopes of an element have identical electronic configuration containing the same number of valence electrons. Due to this fact, all the isotopes of an element show identical chemical properties.

(b) The fractional atomic masses of elements are due to their isotopes having different masses.

(c) The atoms combine with other atoms to achieve the electronic configuration of nearest noble gas and thus, to become more stable.

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