AP Chem PES

AP Chem PES

Assessment

Assessment

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Chemistry

10th - 12th Grade

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10 questions

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1.

Multiple Choice

30 sec

2 pts

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Refer to the photoelectron spectrum of neon shown below to answer the question.

Peaks A, B, and C represent the binding energies of electrons in which subshells of neon?

1s, 2s, 2p

2p, 2s, 1s

1s, 1s, 1s

2s, 2p, 2p

2.

Multiple Choice

30 sec

2 pts

Media Image

Refer to the photoelectron spectrum of neon shown below to answer the question.

Which of the following statements best accounts for peak A being to the left of peaks B and C?

The electron configuration of neon is 1s2 2s2 2p6.

Neon has 8 electrons located in its valence shell.

Core electrons of an atom experience a much higher effective nuclear charge than valence electrons

Peaks B and C show first ionisation energies in neon, whereas peak A shows the second ionisation energy of neon

3.

Multiple Choice

30 sec

2 pts

Media Image

Refer to the photoelectron spectrum of neon shown below to answer the question.

Which of the following statements best accounts for peak C being three time the height of peak B?

The intensity of the photoelectron signal at a given energy is a measure of the number of electrons in that energy level.

Electrons represented by peak B have approximately triple the binding energy than those represented by peak C

In a photoelectron spectrum, as binding energy increases the relative number of electrons decreases.

The height of peaks in a photoelectron spectrum does not have any relation to the structure of the atom

4.

Multiple Choice

30 sec

2 pts

Nitrogen shows 3 peaks in its photoelectron spectrum. These 3 peaks correspond to the binding energies of nitrogen's 1s, 2s, and 2p electrons. The relative heights of the 1s, 2s, and 2p peaks in the PES spectrum of nitrogen will be:

1, 1, 1

2, 2, 3

1, 1, 2

2, 2, 5

5.

Multiple Choice

30 sec

2 pts

If the binding energy of an electron is between 0 - 10 eV, it can be assumed that the electron originated in:

an s orbital

a p orbital

a core electron

a valence orbital

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