CHEM 1007-Spring2025 Take home Quiz 6

Chapter 6

• Question 1: An FM radio station broadcasts electromagnetic radiation at a frequency of 100.6 MHz. The wavelength of this radiation is __ m.

• Question 2: Electromagnetic radiation with a wavelength of 525 nm appears as green light to the human eye. The frequency of this light is __ .

• Question 3: The energy of a photon of light is __proportional to its frequency and __proportional to its wavelength.

  • A) inversely, inversely
  • B) directly, directly
  • C) directly, inversely
  • D) inversely, directly

• Question 4: Of the following, __ radiation has the longest wavelength.

  • A) X-ray
  • B) radio
  • C) microwave
  • D) ultraviolet
  • E) -ray

• Question 5: The wavelength of a photon of energy 5.25 × 10^{-19} J is __m.

• Question 6: The energy of one mole of photons that have a wavelength of 9.0 m is __J.

• Question 7: The n =3 to n = 5 transition in the Bohr hydrogen atom corresponds to the of a photon with a wavelength of nm.

  • A) emission, 1282
  • B) absorption, 657
  • C) absorption, 1380
  • D) emission, 657
  • E) absorption, 1282

• Question 8: Which of the following is an isoelectronic series?

  • A) B5 -, Si4 -, As3 -, Te2 -
  • B) O2 -, F-, Ne, Na+
  • C) F-, Cl-, Br-, I-
  • D) S, Cl, Ar, K
  • E) Si2 -, P2 -, S2 -, Cl2 -

• Question 9: All of the orbitals in a given subshell have the same value(s) of the quantum number(s).

  • A) principal (n)
  • B) angular momentum (l)
  • C) magnetic (ml)
  • D) A and B
  • E) B and C

• Question 10: An electron cannot have the quantum numbers n = , l = , ml = .

  • A) 2, 0, 0, -½
  • B) 2, 1, -1, ½
  • C) 3, 1, -1, ½
  • D) 1, 1, 1, -½
  • E) 3, 2, 1, -½

• Question 11: Which one of the following is an incorrect subshell notation?

  • A) 4f
  • B) 3p
  • C) 3s
  • D) 2p
  • E) 3f

• Question 12: How many electrons can be "stored" in a completely filled 4f sublevel?

  • A) 7
  • B) 10
  • C) 14
  • D) 28
  • E) 6

• Question 13: Which set of the quantum numbers (n, l, ml, ms) corresponds to an electron in a 3d orbital?

  • A) 3, 2, 2, -½
  • B) 3, 3, 2, ½
  • C) 3, 2, 3, ½
  • D) 2, 1, 0, -½

• Question 14: The complete electron configuration of vanadium is .

  • A) 1s22s22p103s23p7
  • B) 1s22s22p63s23p63d34s2
  • C) 1s42s42p63s43p5
  • D) 1s42s42p103s43p1
  • E) 1s42s42p83s43p3

• Question 15: Of the following transitions in the Bohr hydrogen atom, the transition results in the emission of the lowest-energy photon.

  • A) n = 1 → n = 6
  • B) n = 6 → n = 1
  • C) n = 6 → n = 3
  • D) n = 3 → n = 6
  • E) n = 1 → n = 4

• Question 16: The shorthand (condensed) electron configuration for a boron atom is .

  • A) 1s22s22p6
  • B) [Ne]2s22p1
  • C) 1s22s22p1
  • D) [H]2s22p1
  • E) [He]2s22p1

• Question 17: Which of the following cations will have the electronic configuration 1s22s22p63s23p6?

  • A) Co2+
  • B) Ca2+
  • C) Sc+
  • D) Na+
  • D) Cl+

• Question 18: Which electron configuration represents a violation of the Pauli exclusion principle?

• Question 19: What is the electron configuration for aluminum?

  • A) 1s 2 2s 2 2p 3 3s 3
  • B) 1s 2 2s 2 2p 3 3s 3
  • C) 1s 2 2s 2 2p 3 3s 3
  • D) 1s 2 2s 2 2p 3 3s 3
  • E) 1s 2 2s 2 2p 3 3s 3

• Question 20: The frequency of electromagnetic radiation required to promote an electron from n = 2 to n = 4 in a Bohr hydrogen atom is Hz.

  • A) 4.13 × 10^{-19}
  • B) 6.17 × 10^{14}
  • C) 5.46 × 10^{-19}
  • D) 8.22 × 10^{14}
  • E) 4.13 × 10^{19}

• Question 21: When the electron in a hydrogen atom moves from n = 6 to n = 1, light with a wavelength of nm is emitted.

  • A) 487
  • B) 411
  • C) 434
  • D) 93.8
  • E) 657

• Question 22: Which is the correct electron configuration for an oxide ion?

  • A) 1s22s22p3
  • B) 1s22s22p1
  • C) 1s22s22p6
  • D) 1s22s23s2
  • E) 1s22s22p2

Chapter 8

• Question 23: All of the following are ionic compounds except __.

  • A) K2O
  • B) Na2SO4
  • C) Li3N
  • D) NaCl
  • E) CO2

• Question 24: In which of the molecules below is the carbon-carbon distance the shortest?

  • A) H2C CH2
  • B) H-C≡C-H
  • C) H3C—CH3
  • D) H2C C CH2
  • E) H3C—CH2—CH3

• Question 25: Which of the following has the bonds correctly arranged in order of increasing polarity?

  • A) Be—F, Mg—F, N—F, O—F
  • B) O—F, N—F, Be—F, Mg—F
  • C) O—F, Be—F, Mg—F, N—F
  • D) N—F, Be—F, Mg—F, O—F
  • E) Mg—F, Be—F, N—F, O—F

• Question 26: Which of the following structure is the best Lewis structure for the thiocyanate ion (NCS-):

  • (i)
  • (ii)
  • (iii)
  • A) Structure (i)
  • B) Structure (ii)
  • C) Structure (iii)
  • D) All of the above are of equal contribution toward the actual structure of the NCS- ion.
  • E) None of the above

• Question 27: Which of the following does not have eight valence electrons?

  • A) Cl-
  • B) Xe
  • C) Ti+4
  • D) Rb+
  • E) Sr+

• Question 28: The central atom in does not violate the octet rule.

  • A) SF4
  • B) KrF2
  • C) CF4
  • D) XeF4
  • E) ICl4-

• Question 29: The ion ICl4- has valence electrons.

  • A) 34
  • B) 35
  • C) 36
  • D) 28
  • E) 8

• Question 30: There are paired and unpaired electrons in the Lewis symbol for a sulfur atom.

  • A) 4, 2
  • B) 2, 4
  • C) 2, 3
  • D) 4, 4
  • E) 2, 2