The number of protons in U-238 is 92. The number of neutrons in plutonium isotope is 147. The isotope of thorium with 97 protons and 137 neutrons is Th-227.
Mass number is given as the sum of the number of protons and neutrons in an atom. The number to the element is the mass number.
The uranium has mass number 238, and 146 neutrons, the number of protons is given as:
[tex]\rm Protons=Mass\;number-Neutrons\\Protons=238-146\\Protons=92[/tex]
The number of protons in U-238 is 92.
The number of neutrons in Plutonium isotope with mass number 241 and 94 protons is:
[tex]\rm Neutrons=Mass\;number-Protons\\Neutrons=241-94\\Neutrons=147[/tex]
The number of neutrons in plutonium isotope is 147.
The mass number of Thorium with 90 protons and 137 neutrons is:
[tex]\rm Mass\;number=Protons+Neutrons\\Mass\;number=90+137\\Mass\;number =227[/tex]
The isotope of thorium with 97 protons and 137 neutrons is Th-227.
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