Helium is a very non reactive gas.
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The British Isles are a group of islands off the northwest coast of continental Europe
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Hydrometer? Reative humidity, measured in per-cent. (Percentage of the concentration of water vapor which saturates the local atmosphere).
He - Helium
To correct your spelling it is 'Symbol' The symbol for helium is ' He '. It is the second element in the Periodic Table.
helium in a jar diff from helium atom
Unless disturbed by later events, younger layers overlie older layers. See the law of super-position.
The symbol for hydrogen is H, representing the lightest element. The symbol for helium is He, known for being stable, non reactive, and commonly used in balloons and scientific applications.
There is no word equation, except that helium will exist as liquid phase in liquid helium