sophiexdun2002
sophiexdun2002 sophiexdun2002
  • 08-08-2019
  • Chemistry
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What element is this? How do you know?
Pls help!!

What element is this How do you know Pls help class=

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crisviz420
crisviz420 crisviz420
  • 08-08-2019

Answer:

That element is Helium.

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TheBreeze
TheBreeze TheBreeze
  • 08-08-2019

The element is helium.

We know this because if you look at the periodic table, Helium has an atomic number of 2, meaning that it has 2 protons.

To solve for neutrons, we simply subtract the mass by its' number. We can round 4.003 to 4, showing that it has 4 - 2 = 2 neutrons

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