| Term | Definition |
|---|
| matter | anything that has mass and volume |
| physical property | characteristics of matter that are often observed or measured |
| chemical property | characteristics that can be observed when substances react with each other |
| property | a characrteristic or feature |
| law | descriptions of events, patterns, or relationships that have been observed over and over again |
| theory | an explanation of an event that has been supported by consistent, repeated experimental results and has therefore been accepted by most scientists |
| atom | the smallest particle of an element that retains the properties of the element |
| subatomic particles | all atoms are made up of three kinds of smaller particles |
| protons | the positively charged particle found in the nucleus of an atom |
| neutrons | the subatomic particle with no charge, found in the nucleus of an atom |
| electrons | the negatively charged particle found outside the nucleus of an atom |
| atomic theory | description of the nature matter and how it behaves |
| nucleus | tiny, dense, positively charged centre of the atom |
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