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On the NIST website, check the energy levels for the following atoms: helium, sodium and calcium....

On the NIST website, check the energy levels for the following atoms: helium, sodium and calcium. Consider the first 10 terms for each atom. What do the data for sodium have in common with hydrogen energy levels? What are the main differences? Make the same comparison between helium and calcium.

NIST: http://physics.nist.gov/PhysRefData/ASD/index.html

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