Structure of Nucleus
Question 1: What are nucleons?
Answer:
Protons and neutrons which are present in the nuclei of atoms are collectively known as nucleons.
Question 2: What is a mass number?
Answer:
The total number of protons and neutrons (collectively known as nucleons) present in a nucleus is called the mass number of the element. It is denoted by A.
Question 3: What do you mean by atomic mass unit (amu)?
Answer:
One atomic mass unit is defined as (1/12)th of the actual mass of a carbon-12 atom. It is denoted by amu or u. 1 amu = 1.660565×10-27 kg
Question 4: State the relation between amu and MeV.
Answer:
1 amu = 931 MeV
Question 5: How to find the number of neutrons in an atom?
Answer:
Number of neutrons in an atom (N) = Mass number (A) – Number of protons in an atom (Z)
Question 6: State the relation between the radius of a nucleus and mass number.
Answer:
R = R0A1/3
where,
R0 is constant
For electrons R0 = 1.25×10-15m = 1.25 fermi(fm)
Related Resource
Structure of Nucleus
The nucleus of an atom consists of two types of particles, positively charged particles called protons and neutrally charged particles called neutrons. Protons + Neutrons in an atom represent the nucleus of an atom. The nucleus of an atom is represented by ZXA, where X is the nucleus of an atom, Z is the atomic number and A is the mass number.