Final answer:
The nonmetal in the same group as lead (Pb) is carbon (C), which is part of group 14 on the periodic table. This group also contains metals such as tin and flerovium and metalloids like silicon and germanium.
Step-by-step explanation:
The nonmetal in the same group as lead (Pb) is carbon (C). Lead is part of group 14 in the periodic table, which is comprised of both metals and nonmetals. In this group, we find that tin (Sn), lead (Pb), and flerovium (Fl) are the metallic members, whereas carbon is the typical nonmetal of the group. Silicon (Si) and germanium (Ge) fall under the category of semimetals or metalloids. The group is characterized by the presence of the +4 oxidation state, although due to the inert pair effect, heavier elements like tin and lead commonly form stable divalent cations (Sn²+ and Pb²+).
Group 14 does not only showcase the change from nonmetallic to metallic characteristics but also includes important reactions such as passivation and the formation of covalent compounds with oxidation states of 4+, such as SnCl₄ and PbCl₄. As one moves from carbon down to lead, there is a notable shift in properties from nonmetallic carbon to the metallic nature of lead and flerovium.