Write the name of a Nobel gas whose balance shell in present only 2 electron
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hydrogen I think the best answer
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Helium
Explanation:
Helium is a noble gas. It is found in period 1 and group 18 of the periodic table. Its atomic number is 2. The electrons that are present in the outermost shell of the electron are called valance electrons.
As its atomic number is 2. So, helium has only 2 electrons surrounding its nucleus. Its electronic configuration is 1s².
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Noble gas
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