Which type of bond is found between atoms of solid cobalt?
(1) nonpolar covalent (3) metallic
(2) polar covalent (4) ionic

Metallic bond is found between atoms of solid cobalt so the answer is (3) metallic :
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There is one s orbital, and there are three p orbitals, five d orbitals, and seven f orbitals. thus, the answer is b. do not confuse the number of orbitals in a subshell with the number of electrons the subshell can hold. each orbital can hold two electrons, so the capacity of an nf subshell is 14 electrons.