In a comparison of metal and nonmetals, metals have tend to have

Metals are shiny, malleable and good conducters whereas nonmetals are dull, brittle, and insulators. ... It is a metal because it it only has two valence (outer level) electrons. Metals tend to have 3 or less valence electrons.

Explanation:

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.