Adopt-an-element

Californium

Atomic #98. Element symbol Cf. Atomic mass 251. Protons-98 neutrons-153 electrons-98. Configuration simple hexagonal. State of matter solid. Group name actinide series. Density 101.3. Color silvery. Boiling point 1470°C. Melting point 900°C. Discovered by Thompson, in 1950 in California. 3 interesting facts are, most expensive metal, named after California, and the 2nd highest atomic mass of all elements