Question #6465258Single Choice
Chemistry
Question
Which neutral atom has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²?
Options
A
Calcium (Ca, atomic number 20)
B
Potassium (K, atomic number 19)
C
Argon (Ar, atomic number 18)
D
Scandium (Sc, atomic number 21)
Answer & Analysis
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