Which of these is a physical property of a substance? O Flammability
O Heat of combustion
O Reactivity
OSize and shape

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.

12 is probably the typical age for a first kiss but i think its to young.