There are about 117 different

(a) elements
(b) molecules
(c) compounds
(d) mixtures

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Solution

(a) elements
There are about 117 different elements in the periodic table. Many of them are available naturally, while the others are prepared by the scientists in a laboratory.

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Similar questions

Which of the following statements about a compound is incorrect ?

(a) A molecule of a compound has atoms of different elements

(b) A compound cannot be separated into its constituent elements by physical methods of separation

(d) The ratio of atoms of different elements in a compound is fixed

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