26. H2 is atom. But the He2 molecule is unknown.
Explain why?
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Answer:
Helium is a noble gas with an octet configuration
Explanation:
1 molecule of Hydrogen is unstable with only 1 atom of Hydrogen as it needs 2 atoms for a stable covalent bond. As 1 atom of Helium has already obtained the stability, He2 is impossible.
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