11. A subshell with l = 2 can take up
12. Two electrons in an orbital are differentiated by which of the following ?
13. When cathode rays strike a target of high atomic weight, they give rise to
14. How many electrons can be accommodated in d-orbital?
15. The scientist who experimentally proved the existence of positron is
16. When there are two electrons in the same orbital, they have:
17. The antiparticle of an electron is
18. Nucleons are regarded as composites sub-particles known as
19. Conduction band electrons have more mobility than holes because they
20. Which one of the following has greatest mass ?
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