Physical properties of matter Flexibility The flexibility of

Physical properties of matter. • Flexibility The flexibility of a material is its ability to: Bend without breaking Return to its original size and shape after bending • Hardness The hardness of a material is its ability to withstand scratches. • Melting point The melting point of a material is the temperature at which it changes in state from solid to liquid

• Boiling point The boiling point of a material is the temperature at which it changes in state form a liquid to a gas • Strength The strength of a material is the ability to support a heavy load without breaking or tearing • Thermal conductivity • The thermal of heat conductivity of a material is a measure of how readily heat passes through it

• Electrical conductivity The electrical conductivity of a material is a measure of how readily electricity Passes through it.

Density is the volumetric mass density of a substance is its mass per unit volume. The symbol most often used for density is ρ , although the Latin letter D can also be used. Mathematically density is defined as mass dived by volume, where ρ is the density, m is the mass and V is the volume. Fact: Osmuim and Iridium are the densest known elements at standard conditions for temperature and preassure. But certain chemical compounds may be denser.