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Helium is a noble gas, a nonreactive chemical element.

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12y ago
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11y ago

Helium is an inert element where it has two electrons in the first energy level. It is also known as the lightest noble gas.

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6y ago

Helium is an extremely unreactive gas; only a small number of compounds are known, stable only at extremely high pressures or low temperatures.

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11y ago

It is a chemical property.

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10y ago

physical


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9y ago

Physical

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Q: Is unreactive a physical or chemical property?
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