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what is the nucleus made up of?
protons and neutrons
where do the electrons go?
in the energy shells
how many electrons go in the first,second and third shell? (max)
- 1st holds 2 electrons max
- 2nd holds 8 electrons max
- 3rd holds 8 electrons max
- 4th holds any left over
how is each row (period) in the periodic table linked to the number of energy levels?
the number of the row the element is in has the same number of shells
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