Which constituent particle of the atom determine:
(a) mass of an atom (b) size of an atom?

Q. Which of the following is a constituent particle of an atom?

Q. What is the nucleus of an atom? Compare its size with that of the atom. Name its constituents. How is the number of these constituents determined by the atomic number and mass number of the atom?

Q. The difference between the sum of the masses of the constituent particles and the mass of an atom is called ___________.

Q. Thomson's atomic model concluded that _____ is the constituent particle of all kinds of atoms.