The element symbol for cobalt is Co. Its atomic number is 27 and its mass number is 59. The period number for cobalt is 4 while the group number is 9. The name of its group is the Transition Metals 3-12. Cobalt's state of matter is a solid and it is a metal.
Cobalt blue is a color of paint that is dependent on the element for its color.
Can be used in some medicines to treat headaches and cancer.
Cobalt is used to produce many types of alloys because it is a transition metal.