Asked by David
Really basic question - what exactly are core electrons? ENC (effective nuclear charge) has a formula:
# of protons - # of core electrons = ENC
Mg has 12 protons and 10 core electrons, giving it a ENC of 2+.
How do I know that Mg has 10 core electrons?
# of protons - # of core electrons = ENC
Mg has 12 protons and 10 core electrons, giving it a ENC of 2+.
How do I know that Mg has 10 core electrons?
Answers
Answered by
DrBob222
12Mg is 1s2 2s2 2p6 3s2. Those 3s2 electrons are the valence electrons. The other 10 are the core electrons.
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