8PS U3: Chemical Bonding, Reactions and Energy

Front

Molecule

Back

Two or more atoms held together by covalent bonds.

Front

Molecular Model

Back

A three-dimensional representation of a molecule.

Front

Ball and Stick Model

Back

Shows atoms as spheres and bonds as sticks.

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Chemical Reaction

Back

A change in which one or more new substances are formed.

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Reactant

Back

A chemical substance that is present at the start of a chemical reaction.

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Product

Back

A substance that forms in a chemical reaction.

Front

Ionic Bond

Back

Formed when one or more electrons are transferred from one atom to another.

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Covalent Bond

Back

A chemical bond formed when two atoms share electrons.

Front

Metallic Bond

Back

A bond formed by the attraction between positively charged metal ions and the electrons around them.

Front

Hydrogen Bond

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Weak attraction between a hydrogen atom and another atom.