How many electrons are there in the L-shell of Boron?

The correct answer is option (1) 3.

Boron (B) has an atomic number of 5. To determine the number of electrons in its L-shell, let's break down its electronic configuration:

1. Electronic Configuration of Boron (B):

Boron has 5 electrons.

The electronic configuration of boron is: \(1s^2 \, 2s^2 \, 2p^1\).

2. L-shell Electrons:

The L-shell refers to the second energy level, which includes the 2s and 2p orbitals.

The 2s orbital can hold a maximum of 2 electrons, and the 2p orbital can hold a maximum of 6 electrons (2 in each of the three 2p orbitals).

Therefore, the L-shell of boron (B) contains a total of \(2 + 1 = 3\) electrons.

So, the correct answer is 3.