1. Copernicium (Cn), artificially produced transuranium element of atomic number 112

2. Curium is called a transuranium element because it follows uranium on the periodic table

3. Curium was the third synthetic transuranium element of the actinide series to be discovered

4. Plutonium is more poisonous than any other transuranium element because of its high-rate of alpha-particle emission

5. • Plutonium is more poisonous than any other transuranium element because of its high-rate of alpha-particle emission.

6. Californium is an actinide element, the sixth transuranium element to be synthesized, and has the second-highest atomic mass of all the elements that have been produced in amounts large enough to …

7. Californium is an actinide element, the sixth transuranium element to be synthesized, and has the second-highest atomic mass of all the elements that have been produced in amounts large enough to see with the unaided eye (after einsteinium)