1.

In the nucleus of ""_(20)Ca^(40), there are ……….. .

Answer»

10 protons and 40 NEUTRONS
20 protons and 20 neutrons
20 protons and 40 electrons
40 protons and 20 electrons

Solution :Hint : `""_(20)CA^(40)"20 = Atomic number = Number of protons (or) Number of electrons"`
`"40 = Mass number = Number of protons"+"Number of neutrons"`
`THEREFORE ""_(20)Ca^(40)` contains 20 protons, 20 electrons and 20 neutrons.


Discussion

No Comment Found

Related InterviewSolutions