By Deanna Deiter

The atomic mass is 58.933 the atomic radius in angstroms is 2.00 the density is 8.9 grams per cubic centimeter melting point 1495 degrees boiling point 2927 degrees at room temperature a cobalt is a solid the appearance is alustrous silvery blue metalit is magnetic 100 wlcmk) malleability is 6% the hardness is 5 out of 10 the other physical properties Cobalt is a brittle hard silver grey transition metal with magnetic properties simiar to those of iron it has a high melting point and is hard wearing even at high temperatures.There is no flammability the reactivity is magnetic's.