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Number of Neutrons in Helium

How many neutrons are there in the helium atom?

2.

There are 2 neutrons, or neutral subatomic particles, in a helium atom. With its two electrons and two protons, helium is the second simplest of all elements.  This inert noble gas is also the second must abundant element in the universe.

This fact is verified on : February 2, 2010.





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