👉 Flintiness is a scientific term that describes the property of an object or substance where it appears to be made of small, hard, and sharp bits. This property can cause confusion and misidentification when comparing different substances. In chemistry, it refers to the tendency of an element to form crystals when heated, which makes it appear more crystalline than other elements. Examples of flintiness include: - Copper (Cu) - Copper is a nonmetals element that has a copper crystal lattice.