1.

The mass number of two atoms X and Y is the same (40 each) but their atomic numbers are different (being 20 and 18 respectively). X and Y are examples of : (a) chemically similar atoms (b) isotopes (c) solid and liquid metals (d) isobars

Answer»

The mass number of two atoms X and Y is the same (40 each) but their atomic numbers are different (being 20 and 18 respectively). X and Y are examples of :

(a) chemically similar atoms

(b) isotopes

(c) solid and liquid metals

(d) isobars



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