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noble gas
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what is a noble gas and why ?
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For more on marking an answer as the "Best Answer", please visit our FAQ.They used to be called Rare Gases but then it was found that some of them weren't really rare.
They then got called Inert Gases until someone found a way of making some of them react.
They are now called Noble Gases because they have a full set of marbles up top (i.e. 8 electrons in their outer shell)
They then got called Inert Gases until someone found a way of making some of them react.
They are now called Noble Gases because they have a full set of marbles up top (i.e. 8 electrons in their outer shell)