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AP Chemistry Unit 2 Test Prep

This document contains an AP Chemistry practice test with multiple choice and free response questions covering various chemistry concepts. The test includes questions about: 1) Interpreting photoelectron spectra diagrams and predicting how peaks would shift for different elements. 2) Identifying which species (Ar or Ca2+) is associated with a specific peak based on nuclear charge and radius. 3) Explaining why a photoelectron peak appears at a higher energy for oxygen compared to nitrogen. 4) Providing the electronic configurations of nickel in different oxidation states and excited states. 5) Analyzing data on carbon isotope abundances and masses. 6) Calculating wavelength from a given emission spectrum frequency.

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Jack Kirby
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1K views8 pages

AP Chemistry Unit 2 Test Prep

This document contains an AP Chemistry practice test with multiple choice and free response questions covering various chemistry concepts. The test includes questions about: 1) Interpreting photoelectron spectra diagrams and predicting how peaks would shift for different elements. 2) Identifying which species (Ar or Ca2+) is associated with a specific peak based on nuclear charge and radius. 3) Explaining why a photoelectron peak appears at a higher energy for oxygen compared to nitrogen. 4) Providing the electronic configurations of nickel in different oxidation states and excited states. 5) Analyzing data on carbon isotope abundances and masses. 6) Calculating wavelength from a given emission spectrum frequency.

Uploaded by

Jack Kirby
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Name _______________________________ Period _____

AP Chemistry Unit 2 Practice Test

Use the diagram below to answer questions 1 and 2.

1. What element does this spectra represent?


(a) Boron
(b) Nitrogen
(c) Aluminum
(d) Phosphorus

2. If the PES data from an element in the same group below the one depicted in the diagram were shown, what
would you predict would happen to the peak at 100 MJ/mol?
(a) It would be shifted left because of the repulsion of the larger electron cloud
(b) It would be shifted left because of increased nuclear charge
(c) It would be shifted right because of the repulsion of the larger electron cloud
(d) It would be shifted right because of increased nuclear charge

2b.
The photoelectron spectra of the 1s electrons of two isoelectronic species, Ca2+ and Ar, are shown above. Which
of the following correctly identifies the species associated with peak X and provides a valid justification?

(A) Ar, because it has completely filled energy levels


(B) Ar, because its radius is smaller than the radius of Ca
2+

(C) Ca2+, because its nuclear mass is greater than that of Ar


(D) Ca2+, because its nucleus has two more protons than the nucleus of Ar has
Name _______________________________ Period _____

3. The photoelectron spectra above show the energy required to remove a 1s electron from a nitrogen atom and
from an oxygen atom. Which of the following statements best accounts for the peak in the upper spectrum
being to the right of the peak in the lower spectrum?
a) Nitrogen atoms have a half-filled p subshell.
b) There are more electron-electron repulsions in oxygen atoms than in nitrogen atoms.
c) Electrons in the p subshell of oxygen atoms provide more shielding than electrons in the p subshell of
nitrogen atoms.
d) Nitrogen atoms have a smaller nuclear charge than oxygen atoms.

4. What is the electronic configuration of nickel in its ground state, in an oxidation state of +2, and in an
excited state?
a) Ground: [Ar] 4s23d8
+2 state: [Ar]3d8
Excited state: [Ar]4s23d8
b) Ground: [Ar] 4s23d8
+2 state: [Ar]4s23d6
Excited state: [Ar]4s23d84p1
c) Ground: [Ar] 4s23d8
+2 state: [Ar]3d8
Excited state: [Ar]4s23d74p1
d) Ground: [Ar] 4s03d8
+2 state: [Ar]4s23d8
Excited state: [Ar] 4s23d84p0

5. Bonus! Combustion analysis review question!


Name _______________________________ Period _____

6. Carbon has several known isotopes, from 8C to 15C. 12C and 13C are the only stable isotopes present in sufficient
quantities to be readily detected. Use the data in the table below to answer the following questions:

6. Use the mass spectrum below to answer the next two questions:
Name _______________________________ Period _____
Name _______________________________ Period _____
Name _______________________________ Period _____

Practice FRQ

a. A major line in the emission spectrum of neon corresponds to a frequency of 4.34 x 1014 Hz. Calculate the wavelength
of the light that corresponds to this line.

b.
Name _______________________________ Period _____
Name _______________________________ Period _____

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