Question

Which of the four quantum numbers determines
(a) the energy of an electron in a hydrogen atom and multi electron
atoms
(b) the size of an orbital
(c) the shape of an orbital
(d) the orientation of an orbital in space
​

Answer 1

Explanation:

For a - principal quantum no.

For b - principal quantum no. again

For c - Azimuthal quantum no.

For d - Magnetic quantum no....

Hope you got your answer.....

All the best....

Answer 2

a) the energy of an electron in a hydrogen atom and multi electron atoms: Principle Quantum Number

b) the size of an orbital: Principle Quantum Number

c) the shape of an orbital : Azimuthal Quantum Number

d)  the orientation of an orbital in space: Magnetic Quantum Number

​Explanation:

Principle Quantum Numbers : It describes the size of the orbital and the energy level. It is represented by n. Where, n = 1,2,3,4....

Azimuthal Quantum Number : It describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1).For l = 0,1,2,3... the orbitals are s, p, d, f...

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

Spin Quantum number : It describes the direction of electron spin. This is represented as s. The value of this is $+\frac{1}{2}$ for upward spin and  $-\frac{1}{2}$ for downward spin.

Learn More about Quantum Number

https://brainly.com/question/11575590

https://brainly.in/question/14514777