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tstephens

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Questions

The following questions were asked by visitors named tstephens.

A helium atom has a smaller atomic radius than the hydrogen atom. Explain why.
11 years ago

Answers

The following answers were posted by visitors named tstephens.

Hydrogen has one proton and one electron, whereas Helium has two (protons and electrons). But they are both in the same period (energy level) so their average distance from the nucleus is the same. As you travel along a period from left to right, the atom...
11 years ago
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