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Multiple Choice

____ orbit around the nucleus, similar to the way in which planets orbit around the sun.

Electrons orbit around the nucleus because they are negatively charged and are attracted to the positively charged protons inside the nucleus. The nucleus itself is made up of protons and neutrons; protons carry positive charge, neutrons have no charge, and they stay together in the nucleus while electrons stay outside in regions called orbitals or shells. Quarks are the smaller particles that make up protons and neutrons, not objects that orbit the nucleus. So the correct answer is electrons, reflecting the basic idea that the negatively charged electrons move around the positively charged nucleus, much like planets around the sun, though at a quantum level they occupy probability regions rather than fixed paths.

Electrons orbit around the nucleus because they are negatively charged and are attracted to the positively charged protons inside the nucleus. The nucleus itself is made up of protons and neutrons; protons carry positive charge, neutrons have no charge, and they stay together in the nucleus while electrons stay outside in regions called orbitals or shells. Quarks are the smaller particles that make up protons and neutrons, not objects that orbit the nucleus. So the correct answer is electrons, reflecting the basic idea that the negatively charged electrons move around the positively charged nucleus, much like planets around the sun, though at a quantum level they occupy probability regions rather than fixed paths.