Arizona Esthetics State Board Practice Exam

Which of the following particles is known to have a negative electrical charge?

1. Protons

2. Electrons

3. Neutrons

4. Ions

The correct answer is: Electrons

Electrons are known to carry a negative electrical charge, making them essential components of atoms. In more detail, electrons are subatomic particles that orbit the nucleus of an atom and balance the positive charge of protons, which are found within the nucleus. The interaction between the negative charge of electrons and the positive charge of protons is crucial in forming chemical bonds and maintaining the stability of atoms. The distinction of electrons having a negative charge is fundamental in understanding electricity, chemical reactions, and atomic structure. While protons possess a positive charge, neutrons are neutral (having no charge), and ions can be either positively or negatively charged depending on the loss or gain of electrons. This information about the nature of these particles underpins much of the foundational knowledge in both chemistry and physics.