.In an element’s square on the periodic table, the number with the greatest numerical value represents the number of neutrons.
number of electrons.
atomic number.
atomic mass.

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.