If number of electrons in an atom is 8 and number of protons is also 8, then (i) what is the atomic number of the atom? and (ii) what is the charge on the atom?
(i) The atomic number is equal to the number of protons. Therefore, the atomic number of the atom is 8.
(ii) Since the number of both electrons and protons is equal, therefore, the charge on the atom is 0.
For the symbol H, D and T tabulate three fundamental particles found in each of them.
Compare the properties of electron, proton and neutron.
How will you find the valency of chlorine, sulphur and magnesium?
With the help of Table 4.1, find out the mass number of oxygen and sulphur atom.
