1 Which of the following visible colors of light has the longest wavelength?
red
blue
green
yellow
2 When an electron falls from one energy level to a lower energy level in an atom;
Energy is absorbed.
The atom will be in the excited state.
The atom will become an ion.
Energy is emitted.
3 Which of the following principal energy levels (n) will contain electrons with the highest energy?
n = 1
n = 5
n = 4
Electrons in any principal energy levels have same energy.
4 Which of the following sublevels has the least number of orbitals?
5s
3p
4d
4f
5 Which of the following sublevels does not exist?
4f
2d
4s
5d
6 What is the maximum number of electrons that can occupy the 4f sublevel?
2
7
14
10
7 Which of the following is the correct ground-state electron configuration of arsenic?
1s22s22p63s23p64s23d104p3
[Kr]4s24p3
[Ar]4s24p64d5
[Ar]4s24p3
8 Select the number of valence electrons in each of the following atoms in the ground states.
iodine
[ Choose ] 2 6 1 4 3 5 7 8
nitrogen
[ Choose ] 2 6 1 4 3 5 7 8
cesium
[ Choose ] 2 6 1 4 3 5 7 8
tin
[ Choose ] 2 6 1 4 3 5 7 8
9 How many unpaired electrons are there in the orbital diagram of calcium?
2
1
none
5
10 What is the maximum number of electrons in each of the following principal energy level?
n = 1
[ Choose ] 6 electrons 32 electrons 2 electrons 10 electrons 36 electrons 8 electrons 18 electrons 24 electrons
n = 2
[ Choose ] 6 electrons 32 electrons 2 electrons 10 electrons 36 electrons 8 electrons 18 electrons 24 electrons
n = 3
[ Choose ] 6 electrons 32 electrons 2 electrons 10 electrons 36 electrons 8 electrons 18 electrons 24 electrons
n = 4
[ Choose ] 6 electrons 32 electrons 2 electrons 10 electrons 36 electrons 8 electrons 18 electrons 24 electrons
11
Which of the following has the largest atomic radius?
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