Download Name : Version B Student I.D For the following two molecules give

Name :
Version B
Student I.D
1. For the following two molecules give the:
(8 marks)
a) Lewis structure
b) electron group geometry (draw it)
c) molecular geometry
d) hybridization on the central atom
e) and indicate whether the molecule is polar or not. Take the Pauling electronegativity value for
Xe to be 2.6 and a lone pair = 3.7.
NF3
,
XeF2
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Name :
Version B
Student I.D
2. Draw a Lewis structure for carbonate ion, CO3 2- , (carbon is the central atom), showing
all formal charges and lone pairs. If carbonate ion shows resonance, draw all the other
structures that contribute to the resonance hybrid, include formal charges and lone pairs.
(6 marks)
3. Draw a structure that shows the valence bond orbital overlap for C2H6 , ethane
molecule. (4 marks)
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Name :
Version B
Student I.D
4. For the two molecules; C2 and N2 :
Given the molecular orbital energy levels in order of increasing energy,
σ1s < σ1s* < σ2s < σ2s* < π2py = π2pz < σ2px < π2py* = π2pz* < σ2px*
a) draw the molecular orbital energy diagram
b) give the bond order
c) state which are paramagnetic
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