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Answer to these chemistry questions?!?

Alright so i'm doing a lab on atomic radius, ionization energy, and electronegativity.

We have a list of questions to answer and i'm having trouble answering the following:

  1. What is happening to the nucleus and the orbitals as you move across the periodic table?

  2. What do you notice about the energy levels for helium, neon, and argon?

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