Ontario Grade 9 Science Class Practice Exam 2025 – Your Complete Guide to Exam Success!

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What is an electron?

A positively charged particle in an atom

A neutral particle in an atom

A negatively charged particle in an atom that orbits the nucleus

An electron is a fundamental subatomic particle found in atoms. It has a negative charge and is located in the electron cloud surrounding the nucleus. The other options are incorrect because electrons are negatively charged, not positively charged (A),they are not neutral (B), and they are not entire atoms (D).

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A type of atom

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