1. Zeff increases ANS >>> across the periodic table left to right
2. Ionization energy increases ANS >>> left to right across a row and up
column of the periodic table
3. Electron affinity increases ANS >>> left to right across a row and up a
column of the periodic table
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, 4. Element size increases ANS >>> right to left across and row and down a
column of the periodic table
5. Ionization energy ANS >>> the energy required to remove an electron from an
atom
6. Electron affinity ANS >>> the energy required to add an electron to an atom
7. In M.O. theory, the number of atomic orbitals must equal... ANS >>> the
number of molecular orbitals
8. M.O. requirements ANS >>> 1. M.O.s must be built from symmetrically
appropriate or- bitals
2. Energy in bond pairs needs to be approximately the same
3. Efficient overlap of orbitals in a bond
9. Anti bonding orbitals ANS >>> higher in energy than bonding orbitals, created by
overlap of orbitals that are out of phase with each other, contain nodes
10. Node ANS >>> a region with no electron density
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, 11. Bond order ANS >>> b=0.5(# bonding electrons - # anti-bonding
electrons) tells you how many bonds to expect in a molecule
12. M.O.s for B2, C2, and N2 ANS >>> 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
13. Heteronuclear M.O. theory ANS >>> the more electronegative atom is lower in
energy
14. Non-bonding orbitals ANS >>> essentially lone pairs, caused when the
overlap be- tween orbitals is not enough
15. CO M.O. diagram ANS >>> reaction takes place at carbon because the frontier
orbital is mainly "carbon-like" in character
the 3 sigma orbital switches places with the 1 pi orbital
16. "X-like character" in M.O. ANS >>> an orbital has "x-like character" when it
is much closer in energy to one atom rather than the other
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2. Ionization energy increases ANS >>> left to right across a row and up
column of the periodic table
3. Electron affinity increases ANS >>> left to right across a row and up a
column of the periodic table
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, 4. Element size increases ANS >>> right to left across and row and down a
column of the periodic table
5. Ionization energy ANS >>> the energy required to remove an electron from an
atom
6. Electron affinity ANS >>> the energy required to add an electron to an atom
7. In M.O. theory, the number of atomic orbitals must equal... ANS >>> the
number of molecular orbitals
8. M.O. requirements ANS >>> 1. M.O.s must be built from symmetrically
appropriate or- bitals
2. Energy in bond pairs needs to be approximately the same
3. Efficient overlap of orbitals in a bond
9. Anti bonding orbitals ANS >>> higher in energy than bonding orbitals, created by
overlap of orbitals that are out of phase with each other, contain nodes
10. Node ANS >>> a region with no electron density
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, 11. Bond order ANS >>> b=0.5(# bonding electrons - # anti-bonding
electrons) tells you how many bonds to expect in a molecule
12. M.O.s for B2, C2, and N2 ANS >>> 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
13. Heteronuclear M.O. theory ANS >>> the more electronegative atom is lower in
energy
14. Non-bonding orbitals ANS >>> essentially lone pairs, caused when the
overlap be- tween orbitals is not enough
15. CO M.O. diagram ANS >>> reaction takes place at carbon because the frontier
orbital is mainly "carbon-like" in character
the 3 sigma orbital switches places with the 1 pi orbital
16. "X-like character" in M.O. ANS >>> an orbital has "x-like character" when it
is much closer in energy to one atom rather than the other
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