Which one of these transitions in the Bohr hydrogen
atom model leads to the emission of the photon with
the longest wavelength?
1.
2.
3.
4.
5.
ni = 1 → nf = 3
ni = 6 → nf = 5
ni = 4 → nf = 2
ni = 3 → nf = 6
ni = 5 → nf = 1
Dental lasers are based on neodymium yttrium
aluminum garnet (Nd-YAG) crystal, with an emission
wavelength of 1066 nm. What is the frequency of this
laser?
1.
2.
3.
4.
2.812 × 1014 Hz
2.812 × 105 Hz
3.195 × 102 Hz
3.196 × 1018 Hz
The nitrogen laser emits light at 337.1 nm.
What is the energy of this light?
1.
2.
3.
4.
6.696 × 10-32 J
2.118 × 10-31 J
5.893 × 10-20 J
5.893 × 10-19 J
Which of the following is a list of allowed
quantum numbers for an electron?
1.
n = 1, l = 1, ml = 0, ms
=½
2. n = 2, l = 0, ml = 1, ms
=½
3. n = 3, l = 0, ml = 0, ms
=½
4. n = 4, l = 3, ml = 4, ms
= -½
What is the correct electron configuration for
sulfur?
1.
2.
3.
4.
1s22s22p63s13p5
1s22s22p63s23p4
1s22s22p73s23p2
3s23p4
What is the correct condensed electronic
configuration for Fe3+?
1.
2.
3.
4.
[Ar]4s23d6
[Ar]4s23d3
[Ar]3d5
[Ar]4s23d9
Which is the largest atom below?
1.
2.
3.
4.
O
N
Al
Sr
Key
1. 2
2. 1
3. 4
4. 3
5. 2
6. 3
7. 4