Question

answer with explanation(from basics)​

Answer 1

Answer:

L indicates azimuthal quantum number

n Indicates principle quantum num

m indicates magnetic quantum num

e1 = 3s

e2=4s

e3=3d

e4=3p

energy can be comparatively said but adding n and l values.

Explanation:

s,P,,d,f are orbitals in a shell.

for e1...n+l = 3+0 =3

for e2....n+l = 4+0=4

for e3....n+l=3+2=5

f or e4...n+l=3+1=4

......if n+l values are same then consider the value which is having 'n' value the lowest as the least energies amongst them.

now.... energies in decreasing order is as follows...

e3>e2>e4>e1...

so, third option is correct.

hope my answer helps u.if my answer helps u...mark me as brainlist.... and follow me.thank u..