American University of Armenia Electronic Configuration Chemistry Solved Practice

Quiz # 3
1- Write down the full and abbreviated electronic configuration for Ca and
2- Which compound has the largest dipole moment in the gas phase?
H2, Cl2, LiF, HF, F2, HBr
3- Place the compounds in order of increasing atomic radius.
Cs, F, Br, K
4- Write down the full electronic configuration for P3- and As3-. Identify the
core and valence electrons.
5- Draw the Lewis dot structures and assign formal charges to each
element in NO- and Al2O3 and PO43- and NH4+, F2CO and BBr4-.
6- Using the bond energies, determine the approximate enthalpy change
for the following reaction:
(a) PCl3(g) + Cl2(g) → PCl5(l)
Bond Energy (kJ/mol)
7- Identify the non-polar molecules
H2O, PCl3, CHCl3, BeCl2, CH4, CCl4, BrF5
8- Calculate the wavelength of light associated with the transition from n=1
to n=4 in the hydrogen atom.
9- Which ionic solid has the largest lattice energy?
NaF or CsI
10- Which bond is the most electronegative?
C–C, C–B, C–O

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