AP Chemistryeasymcq1 pt
Why do noble gases have very high first ionization energies?
A.They have filled valence shells
B.They are the largest atoms in their period
C.They have no core electrons
D.They form strong covalent bonds
Explanation
Core Concept
A filled octet is a low-energy, stable configuration, so removing an electron costs unusually much energy. Their electrons also feel high effective nuclear charge with little shielding within the period.
Correct Answer
AThey have filled valence shells
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