What is helium-3?
An isotope of helium
A compound
A molecule
A metal
Answer
Helium-3, an isotope of helium, is a rare, non-radioactive element with two protons and one neutron in its nucleus. It is distinct from the more common helium-4, which has two protons and two neutrons. Helium-3 is primarily found in trace amounts on Earth and is often used in scientific research, particularly in the study of nuclear fusion reactions.
The Great Robert Coleman Richardson Quiz: 31 Questions to Test Your Prowess
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