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Answer:
Group Name of family Name of the elements-----
13 Boron family = Boron (5B), aluminium (13Al), gallium (31Ga), indium (49In), thallium (81Tl)
14 Carbon family = Carbon (6C), silicon (14Si), germanium (32Ge), tin (50Sn), lead (82Pb)
15 Nitrogen family = Nitrogen (7N), phosphorus (15P), arsenic (33AS), antimony (51Sb), bismuth (83Bi)
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