Question

What is represented by the dots in a Lewis electron-dot diagram ofan atom of an element in Period 2 of the Periodic Table?

(1) the number of neutrons in the atom(2) the number of protons in the atom(3) the number of valence electrons in the atom(4) the total number of electrons in the atom

Answer 1

(3) The number of valence electrons in the atom.

Answer 2

Answer: Option (3) is the correct answer.

Step-by-step explanation:

In a Lewis electron-dot diagram of an atom shows bonding between different atoms or in a molecule. It also represents lone pairs of electrons that are present over a molecule.

In this diagram, electrons in the outermost shell are represented with the help of dots around the symbol of atom or molecule.

For example, valency of nitrogen is 5 this means nitrogen has 5 electrons in its outermost shell.

Thus, we can conclude that the number of valence electrons in the atom are represented by the dots in a Lewis electron-dot diagram of an atom of an element in Period 2 of the Periodic Table.