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d and f BLOCK ELEMENTS
Question #38603
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Why is the second ionization enthalpy of Zinc (Zn) lower than its first ionization enthalpy?
A. Zinc loses an electron from a filled subshell first
B. Zinc has a low atomic number
C. This statement is incorrect; the second ionization enthalpy is higher
D. The first electron is removed from a higher energy level
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