The sum of the total number of protons and neutrons present in the nucleus of an atom is known as-
Mass number
The correct answer is mass number.
The total number of protons and neutrons present in the nucleus of an atom is known as the mass number. It is represented by the letter A.
Additional Information:
Avogadro's number refers to the total number of units in one mole of any substance. It is equal to $6.022 \times 10^{23}$. This is a constant value.
The atomic number is the number of protons present in the nucleus of an atom. It is represented by the letter Z.
Important Questions from Structure of Atom
Identify the element having zero valency
The atomic number of an element is 8. How many electrons will it gain to form a compound with sodium?
An atom of carbon has 6 protons. Its mass number is 12. How many neutrons are present in an atom of carbon?
What is the atomic number of nitrogen?
What are isobars?
