How many neutrons in (}_{92)^232U a 140 b 232 C 150

The correct answer is a) 140.<br /><br />In the isotope ${}_{92}^{232}U$, the number 92 represents the atomic number, which is the number of protons in the nucleus. The number 232 represents the mass number, which is the sum of the number of protons and neutrons in the nucleus.<br /><br />To find the number of neutrons, we subtract the atomic number from the mass number:<br /><br />Number of neutrons = Mass number - Atomic number<br />Number of neutrons = 232 - 92<br />Number of neutrons = 140<br /><br />Therefore, the isotope ${}_{92}^{232}U$ has 140 neutrons.