Question

When an electron jumps from L to K shell
A. Energy is absorbed
B. Energy is released
C. Energy is sometimes absorbed and sometimes released
D. Energy is neither absorbed nor released

Answer 1

Hint: An atom is composed of a nucleus and the protons which are basically positive in charge and neutrons which are neutral i.e. carries no charge are present inside the nucleus and electrons which are anions i.e. negatively charged ions are rotates around the nucleus.

Complete answer:
The term atomic orbital is generally used to refer to the physical space around the nuclear region where the probability of finding the electron is maximum. An electron shell can be defined as an orbit followed by electrons around an atom's nucleus.
There are number of shells present around the nucleus which can be described as:
1. K shell: This is the closest shell of the nucleus and accommodates a maximum of 2 electrons.
2. L shell: 2nd shell is known by L shell and has at most 8 electrons in its shell.
3. M shell: 3rd shell represented by M shell and this can carry at most 18 electrons.
When an electron jumps from L to K shell i.e. from lower to higher shell energy is released because L is outer shell than K so when electron jumps from higher shell to lower shell energy is released.

Thus option B is the correct answer.

Note:
These shells correspond with the principal quantum numbers n = 1, 2, 3, 4…… and principal quantum number is denoted by n and it gives the principal shell of an atom and the value of n should be a positive integer with the value 1 or more than 1.