Transuranic elements have an atomic number_______________?
Correct answer: C. Greater than 92
- A. Greater than 72
- B. Greater than 82
- C. Greater than 92
- D. Greater than 102
Explanation
Transuranic elements are elements beyond uranium in the periodic table, so their atomic number is greater than 92. The likely mistake is choosing greater than 102 because many well-known synthetic elements have high atomic numbers, but the defining boundary is uranium, Z = 92.
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About Composition of Atomic Nuclei
Atomic nuclei contain positively charged protons and electrically neutral neutrons, collectively called nucleons. Questions use atomic number, mass number and nuclear notation to identify isotopes, isobars and isotones, and may connect nuclear composition with nuclear charge, mass defect, binding energy and the stability of the nucleus.
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