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Atoms and Molecules — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceAtoms and Molecules1 Mark
Question
The lightest element is ________.
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Answer

The lightest element is Hydrogen.
Explanation:
Hydrogen is the lightest and the most plentiful element in the universe. Hydrogen, denoted by the symbol H, has an atomic number of one and joins with many otherelements to produce water, ammonia, hydrocarbons, acids and bases. Hydrogen has an atomic weight of 1.008.

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