Modern Physics Ques 302

  1. How many electrons, protons and neutrons are there in a nucleus of atomic number $11$ and mass number $24$ ? Find,

(1982, 2M)

(a) Number of electrons.

(b) Number of protons.

(c) Number of neutrons.

Show Answer

Answer:

Correct Answer: 302.(Zero, $11,13$)

Solution:

Formula:

Energy In nth Orbit:

  1. Number of proton $=$ atomic number $=11$

Number of neutron $=$ mass number - atomic number $=13$

But note that in the nucleus number of electrons will be zero.



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