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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