How do I calculate the effective nuclear charge of Krypton for a 2s electron?
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Explanation:
Krypton has a larger nuclear charge (Z=36) than argon (Z=18). The shielding of the n=3 shells by the 1s and 2s electrons in the two atoms is approximately equal, so the n=3 electrons in Kr experience a greater effective nuclear charge and are thus situated closer to the nucleus.
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