ELECTRIC CHARGE

1 mark · Easy

State what is meant by a 'neutral atom' in terms of its charges.

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An atom with equal numbers of protons and electrons.

Also accept: The number of positive protons equals the number of negative electrons.; It has no overall charge.; Equal protons and electrons.

Common mistakes: All atoms are neutral.; Only neutrons affect neutrality.

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Marking points

B1 · 1 mark · States that a neutral atom has equal numbers of protons and electrons, or no overall charge.

Worked solution

A neutral atom contains the same number of positive protons as negative electrons, so it has no overall charge.