Carbon and lead are both in Group 14.  One is a non-meta

Carbon, a non-metal, and lead, a metal, are both in group 14 of the periodic table. A physical characteristic of non-metals is that they are generally brittle, while metals are malleable; chemically, non-metals tend to gain electrons in reactions, whereas metals typically lose them. The trend from non-metal to metal in group 14 is attributed to increasing atomic size and decreasing ionization energy, influencing their bonding behaviors.