1.

Classify the elements based on atomicity with examples.

Answer»

Solution :The number of atoms that constitute a MOLECULE of an element is CALLED atomicity of that element.
A molecule of HYDROGEN is MADE up of two atoms and hence its stomicity is two. BASED on the atomicity, elements can be classified as follows:
(i) Monoatomic elements : The elements in which each molecule contains only one atom.
Example : `Cu,Ag,He` etc
(ii) Diatomic elements : The elements in which each molecule contains two atoms.
Example : `H_(2),O_(2)N_(2)` etc
(iii) Polyatomic elements : The elements in which each molecule contains more than two atoms.
Example : `O_(3),P_(4),S_(8)` etc


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