International General Certificate of Secondary Education (IGCSE) Chemistry Practice Exam

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What is the charge of a neutron?

  1. +1

  2. 0

  3. -1

  4. +2

The correct answer is: 0

The charge of a neutron is neutral, which is represented as 0. Neutrons are one of the three primary particles found in an atom, alongside protons and electrons. Protons carry a positive charge, while electrons carry a negative charge. Neutrons, however, do not carry any charge at all. This neutrality is significant because it allows neutrons to stabilize the nucleus of an atom, complementing the positively charged protons. In contrast, other particles in the choices represent varying electrical charges, with positive and negative charges influencing forces between particles in an atom. The presence of neutrons contributes to the atom's mass without affecting its overall charge.

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