Question

The symbol NA is used to denote a) the atomic number b) the Avogadro's number c) the mass number d) the atomic radius​

Answer 1

Answer:

Answer is none of these.

Explanation:

Sodium is a chemical element with symbol Na and atomic number 11.

I hope it's helpful.

Answer 2

The symbol NA is used to denote b) the Avogadro's number

The value of Avogadro's number is $6.022$ × $10^{23}$.

It is the number of molecules of an element present per mole of a substance.

Atmoic number is denoted by Z. It is the number of protons present in an atom.

Mass number is denoted by A. It is the sum total number of protons and neutrons present in an atom.

Atomic radius is denoted by $a_{0}$. It is also known as Bohr's radius which provides a measure of the size of the atom.