Matter and changes

chemistry

the study of the composition, structure and properties of matter and the changes that matter undergoes.

chemical

any substance that has a definite composition or is used or produced in a chemical process.

mass and matter

All matter has mass and takes up space. ,ass is one measure of the amount of matter.

change of state

chemical properties refer to a substance ability to undergo changes that alter its composition and identity.

atom

smallest unit of an element that maintains the chemical identity of the compound

compound

a substance that can be broken down into simple stable substances. each compound is made from the atoms of two or more elements that are chemically bonded

element

a pure substance that cannot be broken down into simpler stable substances and is made of one type of atom.

extensive properties

these properties depend on the amount of matter present. such properties include volume, mass and the amount of energy in a substance.

substance

A substance is matter which has a specific composition and specific properties. Every pure element is a substance

intensive properties

this does not depend on the amount of matter present. these properties include the melting point, boiling point, density, ability to conduct electricity and transfer heat.