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Atoms and Molecules — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceAtoms and Molecules2 Marks
Question
What do the following abbreviation stand for?
a. $O$
b. $20$
c. $\mathrm{O}_2$
d. $3 \mathrm{O}_2$
✓

Answer

a. $\mathrm{O}$ - One atom of oxygen.
b. $20$ - Two separate atoms of oxygen.
c. $\mathrm{O}_2$ - One molecule of oxygen.
d. $3 \mathrm{O}_2$ - Three molecules of oxygen.

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