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 $ .
