William Crookes was a physical chemist who discovered and named the element _______

Options

A. 1. plutonium
B. 2. germanium
C. 3. thallium
D. 4. beryllium

Answer

C

Explanation

Sir William Crookes discovered the element thallium and invented the radiometer,Plutonium was discovered by Enrico Fermi. He has been called the "architect of the nuclear age " and the "architect of the atomic bomb". Germanium was discovered by Clemens Winkler. Beryllium was discovered by Louis Nicolas Vauquelin.