Name: de-Broglie Hypothesis
Uploaded: 2019-07-19
Duration: 4 min 29 s
Description: There is a longstanding debate as to whether light is a wave or a particle. It is not limited to light. What about humans? Let us explore the logic of De Bro...

Question

What are quantum numbers? Describe briefly the four quantum numbers.

Accepted Answer

Quantum numbers $:$ The set of four integers required to define an electron completely in an atom are called quantum numbers.The first three have been derived from Schrodinger wave equation.

Principle quantum number $(n) :$ It describes the size of the electron wave and the total energy of the electron. It has integral values $1, 2, 3, 4 . . . . . . .$ etc.

Azimuthal quantum number $(l)$ $:$ It describes the shape of electron cloud and the number of subshells in a shell. It can have values from $0$ to $(n - 1)$ .

Magnetic Quantum Number $:$ This quantum number describes the orientation of the orbitals. It is represented as $m_{l}$ . The value of this quantum number ranges from $- l$ to $+ l$ .

Spin quantum number $(s)$ $:$ It describes the spin of the electron. It has values $+ 1 / 2$ and $- 1 / 2$ . $(+)$ signifies clockwise spinning and $(-)$ signifies anticlockwise spinning.

What are quantum numbers? Describe briefly the four quantum numbers.

Important Questions on Structure of Atom

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