Explanation:

To find the total number of electrons, we need to know the electronic configuration of the element with atomic number 5.

The atomic number of an element represents the number of protons present in the nucleus of its atom. For an electrically neutral atom, the number of electrons will be equal to the number of protons.

Electronic configuration of Boron (atomic number 5) is 1s²2s²2p¹.

- The first shell (n=1) can hold a maximum of 2 electrons.
- The second shell (n=2) can hold a maximum of 8 electrons.
- The third shell (n=3) can hold a maximum of 18 electrons.
- The fourth shell (n=4) can hold a maximum of 32 electrons.

Therefore, the total number of electrons in Boron will be:

1s²2s²2p¹ = 2 + 2 + 1 = 5

However, the question asks for the total number of electrons for n=5. This means we need to consider the elements with atomic numbers ranging from 1 to 5. The electronic configurations of these elements are:

- Hydrogen (atomic number 1): 1s¹
- Helium (atomic number 2): 1s²
- Lithium (atomic number 3): 1s²2s¹
- Beryllium (atomic number 4): 1s²2s²
- Boron (atomic number 5): 1s²2s²2p¹

Adding up the total number of electrons for each of these elements, we get:

1 + 2 + 2 + 4 + 5 = 14

Therefore, for n=5, the total number of electrons will be 14.

However, the question has a typo and it should be for n=4 instead of n=5. In that case, the total number of electrons will be:

1 + 2 + 2 + 4 + 5 = 14

Adding up the maximum number of electrons that can be accommodated in the first four shells:

2 + 8 + 18 + 32 = 60

Therefore, for n=4, the total number of electrons will be 60.

Option B. 50 is not the correct answer.