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What is helium? Atoms, elements, and chemistry

By |2018-04-01T20:58:53+00:00June 2nd, 2017|Chemistry|

Diagram of a helium atom Helium is a very simple atom. Helium is a simple atom. The nucleus of a helium atom has two protons and two neutrons. Around the nucleus, there are two electrons. The only atom simpler than helium is hydrogen. Stars and helium There are helium atoms inside stars. The star [...]