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 –

With reference to ‘Isotopes’, which of the following statements is/are correct? 1. Atoms with identical atomic numbers but different atomic mass numbers are known as isotopes. 2. Protium, Deuterium and Tritium are isotopes of carbon. Select the correct answer from the code given below: Code: