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COMPONENTS OF MATTER
Atoms
The basic unit from which all matter is made. Different substances are made up of different types of atoms. An atom has a positively charged center, or nucleus, containing smaller particles. Negatively charged particles circle around the nucleus and form a cloud of negative charge
Elements
Substances are made up of only one type of atom, which are called elements. Each element is identified by it's physical and chemical properties. Some examples can be oxygen, aluminum, using symbols "O" and "Al".
Molecules
A molecule is a group of two or mroe atoms held together by chemical bonds. A molecule of carbon dioxide, is made up of carbon atoms and chemically conbined with oxygen. Two atoms can also form a molecule.
Compounds
A compound is a substance made of two or more elements that are chemically combined in a set ratio. A compound is represented by a chemical formula, which shows the elements and compound int he ratio.
TYPES OF PROPERTIES
Physical Properties
Physical Properties
A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity.Â
Chemical Properties
Chemical Properties
A chemical property is a characteristics that descrives something's ability to become something else. Other properties can only be observed by combining or breaking apart substances.
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