INORGANIC CHEMISTRY ACS EXAM Questions and Answers 2026 | Final Revision Guide with Explanations | A+ Verified

INORGANIC CHEMISTRY ACS EXAM Questions
and Answers 2026 | Final Revision Guide
with Explanations | A+ Verified
• Ionization energy increases. CORRECT ANSWER: left to right across a
row and up column of the periodic table


• Electron affinity increases. CORRECT ANSWER: left to right across a
row and up a column of the periodic table


• Element size increases. CORRECT ANSWER: right to left across and
row and down a column of the periodic table


• Ionization energy. CORRECT ANSWER: the energy required to remove
an electron from an atom


• Electron affinity. CORRECT ANSWER: the energy required to add an
electron to an atom


• In M.O. theory, the number of atomic orbitals must equal.... CORRECT
ANSWER: the number of molecular orbitals


• M.O. requirements. CORRECT ANSWER: 1. M.O.s must be built from
symmetrically appropriate orbitals
2. Energy in bond pairs needs to be approximately the same

, 3. Efficient overlap of orbitals in a bond


• Anti bonding orbitals. CORRECT ANSWER: higher in energy than
bonding orbitals, created by overlap of orbitals that are out of phase
with each other, contain nodes


• Node. CORRECT ANSWER: a region with no electron density


• Bond order. CORRECT ANSWER: b=0.5(# bonding electrons - # anti-
bonding electrons)
tells you how many bonds to expect in a molecule


• M.O.s for B2, C2, and N2. CORRECT ANSWER: there is a small change
in energy between 2s and 2p orbitals, causing them to mix
this results in the 3 sigma orbital to be higher in energy than the 1 pi
orbital


• Heteronuclear M.O. theory. CORRECT ANSWER: the more
electronegative atom is lower in energy


• Non-bonding orbitals. CORRECT ANSWER: essentially lone pairs,
caused when the overlap between orbitals is not enough