Atoms And Nuclei Question 164

Question: In $ _{88}Ra^{226} $ nucleus, there are [MP PMT/PET 1998]

Options:

A) 138 protons and 88 neutrons

B) 138 neutrons and 88 protons

C) 226 protons and 88 electrons

D) 226 neutrons and 138 electrons

Show Answer

Answer:

Correct Answer: B

Solution:

$ _{z}X^{A}{= _{88}}Ra^{226} $

Number of protons = Z = 88

Number of neutrons $ =A-Z=226-88=138 $ .



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