Transcription: Helium atoms have atomic number 2, which means that they have two protons in the nucleus and they have two electrons to balance the charge of the protons. If one of the electrons is removed, the result is a helium plus ion. This ion has a single electron, just like the hydrogen atom, but it has a more massive nucleus and its nucleus has double the charge on a hydrogen nucleus. What is the effect of increasing the charge on the nucleus? That is the question that you will be trying to answer in this section. Your objective is to discover how the change from hydrogen atom to helium ion, a change ...
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