What is second ionization enthalpy?
- AEnergy required to remove the first electron from a neutral atom.
- BEnergy required to remove the second electron from a unipositive ion.
- CEnergy released when an electron is added to a unipositive ion.
- DEnergy required to remove the second electron from a neutral atom.
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For which of the following reactions is the $\Delta H^o$ value equal to the first ionization energy of $Ca$?
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The first ionization enthalpy of $Al$ is lower than that of $Mg$ because .......................
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The element having the greatest difference between its first and second ionization energies is:
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