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Atoms and Molecules — Science STD 9 — Question

Gujarat 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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