1. Electrons in Atoms, Light and the Periodic Table

2. A packet of light energy or a particle of light is called a(n)
9.2
proton.
photon.
electron.
frequency.
gamma ray.
Answer: b

3. How are frequency and wavelength of light related?
9.4
The lower the frequency, the smaller the wavelength.
The wavelength and frequency are equal.
The larger the wavelength, the higher the frequency.
The higher the frequency, the smaller the wavelength.
None of the above
Answer: c

4. Arrange the following types of electromagnetic radiation in order of decreasing frequency.
9.7
Gamma, X-ray, radio wave, IR, microwave
Radio wave, IR, visible, UV, cosmic
Radio wave, microwave, visible, UV, gamma
X-ray, UV, IR, microwave, radio wave
Gamma, UV, visible, IR, radio wave
Answer: d

5. Which color of visible light has the least energy per photon?
9.9
Blue
Yellow
Red
Violet
Green
Answer: c

6. The Bohr model correctly predicts the emission spectrum of
9.10
hydrogen.
helium.
oxygen.
neon.
all atoms.
Answer: a

7. What is the shape of a p orbital?
9.11
Spherical
Donut
Pyramidal
Dumbbell
Square
Answer: d

8. How many orbitals are associated with a given set of d orbitals with the same principal quantum number?
9.12 1 7 3 9 5
Answer: e

9. What is the maximum number of electrons allowed in each f orbital?
9.13 2 6 8 10 14
Answer: e

10. What is the maximum number of electrons in the n = 4 principal energy level?
9.14 6 8 18 32 64
Answer: d

11. Which of the following electron configurations is NOT possible?
9.15
1s22s22p3
[Ar]4s24d104p4
[Ne]3s2
[He]2s22p63s2
[Kr]5s24d105p2
Answer: b

12. Which of the following elements has the following electron configuration 1s22s22p63s23p5?
9.16 O Cl F Ar S
Answer: b

13. What is the electron configuration for sulfur?
9.18
[Ar]4s24p5
[Ne]3s23p4
1s22s22p63s23p4
1s22s22p63s23p5
Two of the above
Answer: e

14. What is the electron configuration for the copper atom?
9.20
1s22s22p63s23p64s23d7
[Ar]4s24d9
[Ar]4s13d10
1s22s22p2
[Ar]4s23d9
Answer: c

15. Arrange the following elements in order of increasing ionization energy: Si, F, K, Mg, S
9.23
K, Mg, S, Si, F
Si, S, K, F, Mg
F, Si, S, Mg, K
K, Mg, Si, S, F
F, Mg, Si, K, S
Answer: d

16. Light is emitted from an atom when
9.29
electrons move farther from the nucleus in energized atoms.
excited electrons return to lower energy paths around the nucleus.
the nucleus becomes excited (or energized).
photons move farther from the nucleus in energized atoms.
Two of these statements are correct.
Answer: b