بنات بلييز الي تعرف تجوابني:
Calculate the wavelength of a 1.45x10-18 J photon.
1.56x10-7 m
9.81x10-7 m
1.37x10-7 m
9.57x10-7 m
3.45x10-8 m
Calculate the wavelength of a photon that has a frequency of 2.33x1016/s.
5.98x10-8 m
7.77x107 m
6.96x10-8 m
3.85x10-8 m
1.29x10-8 m
Niels Bohr is credited with what scientific contribution?
The discovery of the electron
The discovery of the photon
The observation that matter emits light
The discovery of the equation E = hv
The theory that electrons in atoms are arranged in shells with discrete energies
What values of l are permitted for an electron with n = 4?
1, 2, 3
1, 2, 3, 4
0, 1, 2, 3
0, 1, 2, 3, 4
0, 1, 2, 3, 4, 5
What values of m are permitted for an electron with l = 3?
0, 1, 2
-3, -2, -1, 0, 1, 2, 3
-2, -1, 0, 1, 2
1, 2, 3
-3, -2, -1, 1, 2, 3
Which one of the following sets of quantum numbers is not permitted?
n = 4, l = 2, m = 3 , s = -1/2
n = 2, l = 1, m = 0 , s = 1/2
n = 2, l = 0, m = 0 , s = -1/2
n = 3, l = 1, m = -1 , s = 1/2
n = 5, l = 4, m = -4 , s = -1/2
Which of the following electrons, identified only by their n and l quantum numbers, has the highest energy?
n = 3, l = 0
n = 4, l = 1
n = 3, l = 2
n = 4, l = 2
1- n = 4, l = 2
2- n = 4, l = 1
3- n = 3, l = 2
4- n = 3, l = 0
5- All of these have the same energy
Which one of the following electrons is degenerate with an electron with quantum numbers n = 4, l = 2, m = -1 , s = 1/2?
n = 5, l = 1, m = -1 , s = 1/2
n = 6, l = 0, m = 0 , s = -1/2
n = 4, l = 2, m = 2 , s = -1/2
n = 4, l = 3, m = -1 , s = 1/2
None of these
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