Which of the following sets of quantum numbers represent an impossible arrangement?
n | l | m | s | |
1. | 3 | 2 | -2 | (+)\(\frac{1}{2}\) |
2. | 4 | 0 | 0 | (-)\(\frac{1}{2}\) |
3. | 3 | 2 | -3 | (+)\(\frac{1}{2}\) |
4. | 5 | 3 | 0 | (-)\(\frac{1}{2}\) |
Correct set of four quantum numbers for the outermost electron of rubidium (Z=37) is:
1. 5, 0, 0, 1/2
2. 5, 1, 0, 1/2
3. 5, 1, 1, 1/2
4. 6, 0, 0, 1/2
Number of unpaired electrons in 1s2 2s2 2p3 is -
1. 2
2. 0
3. 3
4. 1
The quantum numbers of four electrons are given below.
n m s
(1) Electron 1 3 0 0 -1/2
(2) Electron 2 4 0 0 1/2
(3) Electron 3 3 2 0 1/2
(4) Electron 4 3 1 0 -1/2
The correct order of decreasing energy of these electrons is -
1. Electron 3 > Electron 1 > Electron 4> Electron 2
2. Electron 4> Electron 2 > Electron 3 > Electron 1
3. Electron 3 > Electron 2 > Electron 4 > Electron 1
4. Electron 2 > Electron 4 > Electron 3 > Electron 1
Which type of radiation is not emitted by the electronic structure of atoms:
1. Ultraviolet light
2. X-rays
3. Visible light
4. y-rays
An absorption line of the lowest frequency in the transition of hydrogen spectra is:
1. n=1 to n=2
2. n=3 to n=8
3. n=2 to n=1
4. n=8 to n=3
The maximum number of atomic orbitals associated with a principal quantum number 5 is-
1. 9
2. 12
3. 16
4. 25
The de-Broglie wavelength of a particle having the momentum of
3.3 x 10-24 kg m s-1 will be;
1. 0.002 Å
2. 0.02 Å
3. 0.2 Å
4. 2Å
The quantum number of the most energetic electron in an Ne atom in the first excited state is
1. | 2, 1, 0, +1/2 | 2. | 3, 1, 1, +1/2 |
3. | 3, 0, 0, +1/2 | 4. | 3, 1, 0, +1/2 |
The total number of neutrons in dipositive zinc ions with mass number 70 is -
1. 34
2. 40
3. 36
4. 38