Pantavalent material as it is made up of atoms which have five valence electrons.It produces n-type extrinsic semiconductor.Ex.-Arsenic(As).It provides majorty of electrons
it is the combination of five vaccines they are diptheria , pertusis,tetanus ,hep b ,hib virus
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Located in the Periodic Table's Group IIIA, they list as Boron, Aluminum, Gallium, Indium, Thallium, Dysprosium and Californium.
electron donor