hw5addendum - H omework #5 addendum October 8 3.091 Fall...

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Homework #5 addendum October 8 1. Beryllium and nitrogen can react to form the molecule, beryllium nitride (BeN). To show that BeN is stable and paramagnetic use LCAO-MO theory (linear combination of atomic orbitals - molecular orbitals) to construct an energy-level diagram that includes the energy levels of the atoms and the bonding and antibonding orbitals of the molecule. Indicate the occupation of the orbitals with arrows. The filling sequence of molecular 2p orbitals in BeN is π 2p , σ 2p , π * 2p , σ * 2p . 2. In the liquid state, to which will an argon atom bond more strongly, another argon atom or a krypton atom? Explain. Kr. Kr is larger than Ar and has more electrons + Kr is more polarizable than Ar + Kr is capable of stronger van der Waals bonding 3. Both ammonia (NH 3 ) and phosphine (PH 3 ) are gases at room temperature. Identify which compound has the higher boiling point and explain your reasoning. N
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hw5addendum - H omework #5 addendum October 8 3.091 Fall...

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