Chemistry Chapter 2 - (Elements, Compounds and Mixtures)

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Last updated 2:38 PM on 9/21/26
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9 Terms

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Define the term “Element”.

A pure substance made of only one type of atom.

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Examples of Element.

Sodium (Na).

Oxygen (O₂).

Hydrogen (H₂).

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Define the term “Compound”.

A pure substance formed when two or more atoms are chemically combined.

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Examples of “Compounds”.

Water (H₂O).

Carbon Dioxide (CO₂).

Sodium Chloride (NaCl).

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Define the term “Mixture”.

Two or more substances that are not chemically combined.

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Examples of Mixture.

Air.

Salt Water.

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Define the term “Atoms”.

Smallest particles of an element that cannot be broken down.

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Define the term “Molecule”.

A group of two or more elements that are chemically combined.

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Define the term “Thermal Decomposition”.

The breakdown of compounds into two or more simpler substances when heated.