Atoms,Elements, Molecules and compounds
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5 Terms
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Atom
The basic unit of matter.
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Element
A pure substance consisting of only one type of atom.
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Molecule
A group of atoms bonded together.
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Compound
A substance composed of different elements in fixed ratios.
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Explain the statement ‘‘All molecules are compounds but not all compounds are molecules’’
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Molecules are bonded atoms, while compounds are different element substances. Some compounds, like salts, consist of ions. Molecules are a subset of compounds.
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