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Atoms and Molecules — Science STD 9 — Question

Rajasthan BoardEnglish MediumSTD 9ScienceAtoms and Molecules2 Marks
Question
What do the following denote?
$a.\ N \ \ \ b.\ 2N \ \ \ c.\ N_2\ \ \ d. \ 2N_2$
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Answer

$a.\ N$ One atom of nitrogen.
$b.\ 2N$ Two separate atoms of nitrogen.
$c\ .N_2$ One molecule of nitrogen.
$d.\ 2N_2$ Two molecules of nitrogen.

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