AP Chemistry Spectroscopy

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

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

Tags

NGSS.HS-PS1-1

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

Using the data in the two PES, what do you expect the binding energy of the 1s electrons in oxygen (atomic number 8) to be?

• 0 - 50 eV

• 50 - 400 eV

• 400 - 700 eV

• 700 - 1000 eV

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the identity of element Z?

• Boron

• Carbon

• Neon

• Magnesium

Tags

NGSS.HS-PS1-1

Which peak gives the binding energy of sodium's valence electrons

• A

• B

• C

• D

Which peak shows electrons closest to the nucleus

• A

• B

• C

• D

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

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2