Question

Anything that influences the valence electrons will affect the chemistry of the element. Nuclear mass effects chemistry of valence electrons.
A. True
B. False

Answer 1

Hint: Try to define the meaning of valence electrons and how the change in the valence electrons will influence the chemistry of an element. Then remember about the factors affecting the valence electrons and try to find out whether nuclear mass has an influence or not.

Complete step by step answer:
First of all, let us know about what valence electrons are and how it is having an effect on the chemistry of the atom or an element. Then, state about what is nuclear mass and on what factors it depends.
So, valence electrons can be defined as the number of electrons which are present in the outermost shell or which is also called as the valence shell of an atom or an element. These are arranged in different orbitals or shells and are mostly negatively charged particles (as electrons are normally negative in nature). Valence electrons are mostly responsible for the interaction between two same or different atoms and further in formation of a chemical bond. In short, we can say the electrons that are present in the outer shells which are usually not filled are called the valence electrons.
So, the number of valence electrons helps us to represent the chemical properties, such as valency, formation of bonds, etc as it is responsible for the interaction.
Whereas, the nuclear mass represents the sum of the number of protons and neutrons and basically it depends on protons and neutrons. So, it has no relation with the valence electron and thus, does not affect the chemistry of the valence electrons. Therefore, the given statement is incorrect.
So, the correct answer is “Option B”.

Note: Remember the factors affecting the valence electrons which will further affect the chemical structure are nuclear charge of an atom (charge on the nucleus and is normally controlled by the number of protons and electrons), the principal quantum number (says about the principle electron shell of the atom) and the number of electrons present in the atom.