Correct Answer: Option C

Explanation

The element \(^{238} _{92}Ur\) ⇒ Mass number = 238

                                                      Atomic number = 92

Recall that Mass number = Number of protons  +  Number of  neutrons  while atomic number = number of protons

            So, Mass number =  Number of protons + Number of neutrons

                              238     =        92         +    Number of neutrons

Number of neutrons = 238 - 92 = 146 neutrons

Number of protons  = 92

Therefore, there are 92 protons and 146 neutrons - Option C

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