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Anestetic [448]
3 years ago
13

Why is helium in group 18 on the periodic table though it only has 2 valence electrons?

Chemistry
1 answer:
damaskus [11]3 years ago
8 0
<span> strictly speaking, a molecule has at least two atoms. ... Atoms with full valence electron shells are stable. Full Text[ edit ] The noble gases are a group of chemical elements that make up Group 18 on the periodic table.</span>
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