topic 12 - Molecular Orbital Theory

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1
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main idea of MO theory

electrons are responding to all the nuclear charges in a molecule and not just to individual atoms

implies that atomic orbitals are not preserved

2
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what do MO theory diagrams show?

show that subshells contain bonding molecular orbitals (bond is formed) and antibonding orbitals (bond is not formed), bonding requiring less energy.

3
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how to solve for bond order with MO theory?

bond order = ( bonding electrons - antibonding electrons )/2

4
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exceptions to general rule when it comes to energy level model

B2, C2, N2