EasyChemistryHigh School (9–10)GeneralAtoms and Molecules › Molecules, Ions and FormulaeConceptualBoard Exam

Each of these is a molecule. Say which are molecules of an element and which are molecules of a…

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Each of these is a molecule. Say which are molecules of an element and which are molecules of a compound, and give the atomicity of each.

$\text{N}_2$
$\text{CO}$
$\text{P}_4$
$\text{H}_2\text{O}_2$
$\text{S}_8$
$\text{NO}_2$

Need a reminder? The key ideaShow

A molecule is a group of atoms joined together. Its atomicity is the number of atoms in it. A small number after a symbol counts atoms in one molecule; a number in front counts molecules; a number after a bracket multiplies everything inside.

The worked solution

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Each of these is a molecule. Say which are molecules of an element and which are molecules of a…

The worked solution

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