Which element could provide one atom to make an ionic bond with fluorine? (hydrogen will not make ionic bonds easily, so do not use this element).

Any element from group 1 of the Periodic Table.

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.