With the help of Table 4.1, find out the mass number of oxygen and sulphur atom.
Mass number of oxygen = Number of protons + Number of neutrons = 8 + 8 = 16
Mass number of sulphur = Number of protons + Number of neutrons = 16 +16 = 32
How will you find the valency of chlorine, sulphur and magnesium?
For the symbol H, D and T tabulate three fundamental particles found in each of them.
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?
Compare the properties of electron, proton and neutron.
