chemistry

physical property

A physical property is any property that is measurable whose value describes a state of a physical system. The changes in the physical properties of a system can be used to describe its transformations or evolutions between its momentary states.

physical change

Any change that occurs without altering the chemical composition of a substance is a physical change. Physical changes can include changing the color, shape, state of matter, or volume of a substance.

mass

Definition of Mass. A measure of the amount of matter in an object. Mass is usually measured in grams or kilograms.

volume

Definition of volume. Measures the size of an object using length measurements in three dimensions

density

Density is defined as the ratio between mass and volume or mass per unit volume. It is a measure of how much stuff an object has in a unit volume (cubic meter or cubic centimeter).

product

The substances that result from this recombination of atoms are called the products of the reaction. When chemical reactions are written down, the reactants are written on the left side in a similar manner to a math equation, one reactant plus another.

chemical reaction

a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction.

chemical property

a property or characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed: Combustibility is an important chemical property to consider when choosing building materials.

reactant

a substance that takes part in and undergoes change during a reaction.