How many shells does cobalt have?

Cobalt has fifteen electrons in its third shell that holds a maximum of eighteen electrons (as seen in zinc). If you look at a series of elements, cobalt is in good company with its neighbors iron, nickel, copper and zinc. Humans have found many uses for these metals for thousands of years. read more

Cobalt is a transition metal that does not follow the octet rule. Its final elemental configuration is 3d7 4s2. While a d orbital can hold up to 10 electrons, less energy is required to fill the 4s orbital. Cobalt-60 is an isotope used in the treatment of cancer. read more

Cobalt is a transition metal that does not follow the octet rule. Its final elemental configuration is 3d7 4s2. While a d orbital can hold up to 10 electrons, less energy is required to fill the 4s orbital. read more