Atomic Structure

The constituents of atomic nucleus are –

Consider the following events and arrange them in correct chronological order starting from the earliest to the last activity : (I) Discovery of pi meson (II) Discovery of neutron (III) Discovery of electron (IV) Discovery of proton Select the correct answer from the code given below : Code :

In atom, neutron was discovered by :

Which of the following is not a sub-atomic particle?

Which one of the following pairs constitutes particle-antiparticle pair?

Which of the following particles has zero charge?

The atoms, in which the number of protons is same but the number of neutrons is different, are known as –