Caesium is the softest element (it has the hardness of 0.2 Mohs), very ductile, pale metal, which darkens in the presence of trace amounts of oxygen.
It is very ductile, pale metal, which darkens in the presence of trace amounts of oxygen. Caesium is the softest element (it has a hardness of 0.2 Mohs).
Caesium is the softest element (it has a hardness of 0.2 Mohs). It is very ductile, pale metal, which darkens in the presence of trace amounts of oxygen.
Caesium is the softest element (it has a hardness of 0.2 Mohs). It is very ductile, pale metal, which darkens in the presence of trace amounts of oxygen.