Which subatomic particle was discovered by :
(i) Chadwick ? (ii) Thomson ? (iii) Goldstein ?

The subatomic particle called electron was discovered by :

Which of the following particles was discovered earliest?

Which of the following subatomic particle was covered by Goldstein on the basis of the cathode ray experiment ?

Which subatomic particle is not present in an ordinary hydrogen atom ?

(a) Describe Thomson's model of the atom. Which subatomic particle was not present in Thomson's model of the atom? (b) The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?

Find: ( i ) (ii) (ii) (iii)

For which subatomic particle the ratio of charge and mass would be greater. (A) Proton, (B) Alpha particle, (C) Neutron, (D) Electron

PS-I and PS-II , were discovered by

Find : ( i ) (ii) (ii) (iii) (iii) (iv)