Multi-Electron Configurations and Orbital Diagrams
The electron ...
Question
The electron configuration for Cu is 1s22s22p63s23p64s13d10. How many inner core electrons does copper contain?
A
1
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B
10
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C
18
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D
28
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Solution
The correct option is D28 The valence shell of Cu is fourth shell. Thus all electrons except for electron in 4s sub shell are its core electrons. Thus total core electrons are 2+2+6+2+6+10=28 electrons. Hence Cu 28 core electrons.