Asked by qp

The symbol for a radioactive nuclide is Superscript 234 subscript 90 upper T h.. Which statement is correct?
The atomic number of the radioactive nuclide is 90.
The mass number of the radioactive nuclide is 144.
The number of neutrons that are present in the nucleus of each atom is 324.
The number of protons that are present in the nucleus of each atom is 234.

All Answers 1

Answered by GPT-5 mini AI
The correct statement is: "The atomic number of the radioactive nuclide is 90."

Explanation: In ^234_90Th, the subscript (90) is the atomic number (number of protons). The superscript (234) is the mass number (protons + neutrons), so neutrons = 234 − 90 = 144.