EVERYDAY SCIENCE

Detailed explanation-1: -Valence electrons are the electrons located at the outermost shell of an atom. … Because when two atoms interact, the electrons in the outermost shells are the first ones to come into contact with each other and are the ones that determine how an atom will react in a chemical reaction.

Detailed explanation-2: -The valence electrons mainly determine the chemical properties of the elements. The elements in the same group have similar chemical properties because they have the same valence shell electron configuration.

Detailed explanation-3: -The chemical properties of an element are determined by the number of electrons in its atom, which in turn is determined by the number of protons.

Detailed explanation-4: -The nucleus is composed of protons with a positive charge and neutrons without charge, and the number of protons (atomic number) determines the chemical properties of the atom (element type).