Question

Distncdistance between helium and hydrogen atom at elast energy

Answer 1

Answer:

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Explanation:

Hydrogen and helium illustrate the fact that not all atoms have the same properties. ... Atoms of hydrogen have a single proton in their center and a single electron in the lowest energy level. Helium atoms, on the other hand, have two protons and two electrons in the lowest energy level.

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Answer 2

Answer:

hydrogen and helium illustrate the fact that all the elements not have same properties