Answer Happy

1. (1 points) Phosphorus has a larger first Ionization Energy
than Silicon. Which of the following statement most accurately
explains WHY this is observed?


A- Phosphorus has a higher effective nuclear charge than
Silicon, therefore when an electron is added more energy is
released.
B- Less energy will be required to cause Silicon to lose an
electron because an electron lost from Silicon is a paired
electron, whereas an electron lost from Phosphorus is an electron
in a singly occupied orbital.
C- Phosphorus has a higher effective nuclear charge than
Silicon, therefore it requires more energy for an electron to be
lost.
D- Less energy will be required to cause Silicon to lose an
electron because an electron lost from Silicon is lost from a
higher energy orbital than an electron lost from
Phosphorus.
E- Less energy will be released when Silicon gains an
electron because an electron added to Silicon is added to a higher
energy orbital than an electron added to
Phosphorus.
F- Less energy will be released when Silicon gains an
electron because an electron added to Silicon will create the first
electron pair in the degenerate set of orbitals, whereas an
electron added to Phosphorus will remain in a singly occupied
orbital.
2. (1 points) Which of the following reaction represents
the FIFTH Electron Affinity of I?




A- I4- + e− →
I5-

B- I4+ → I5+ +
e−

C- I + 5 e− → I5-

D- I → I5+ + 5
e−

E- I5- + e− →
I6-

F- I5+ → I6+ +
e−
3. (1.5 points) Consider the following bonds. Using
the periodic trends, predict the order of these bonds
based on decreasing percent ionic
character.

INSTRUCTIONS: Assign a value of 1 to
the bond with the highest percent ionic character and a value of 3
to the bond with the lowest percent ionic character.



NOTE: All answers must be correct
for the question to be graded as correct. There
are NO part marks for this
question; if some of the blanks are correct and any of the others
are not it will be marked as incorrect.




1 2 3 Ga-F
1 2 3 Se-F
1 2 3 As-F
4. (0.5 point) In class, we focussed on approximating the
effective nuclear charge for elements in the s-
and p-blocks using the
equation Zeff = Z - S.
Using this equation, and the ground state electron configuration,
approximate the effective nuclear charge
of Mn.

INSTRUCTIONS: Input your answer into
the box below as a positive integer.



Zeff =