which is classified as an inner transition element?\n○ calcium\n○ copper\n○ fermium\n○ helium

which is classified as an inner transition element?\n○ calcium\n○ copper\n○ fermium\n○ helium
Answer
Brief Explanations:
Inner - transition elements are the elements in the f - block of the periodic table. Calcium is an alkaline - earth metal, copper is a transition metal, helium is a noble gas. Fermium is an actinide (inner - transition element).
Answer:
C. fermium