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Unit B-2
| Term | Definition |
|---|---|
| state of matter | one of the forms that matter takes on |
| solid | firm in shape, not liquid |
| liquid | flowing freely but of constant volume. a consistency like water |
| gas | an airlike fluid substance that expands freely to fill any space available |
| atom | the basic unit of a chemical element |
| proton | a subatomic particle, with a positive charge |
| neutron | a subatomic particle, with a negative charge |
| nucleus | the central or middle where the protons and neutrons are located |
| electron | a stable subatomic particle with a charge of negative electricity |
| electron cloud | an informal term in physics, is used to describe where electrons are when they go around the nucleus of an atom |
| valence electron | an electron in one of the outer shells of an atom that can participate in forming chemical bonds with other atoms |
| Periodic Table of Elements | is a tabular arrangement of the chemical elements |
| reactivity | he state or power of being reactive or the degree to which a thing is reactive |
| atomic number | the number of protons in the nucleus of an atom |
| mass number | the total number of protons and neutrons in a nucleus |
| atomic mass | the mass of an atom of a chemical element expressed in atomic mass units |
| element | a part or aspect of something abstract, especially one that is essential or characteristic |
Created by:
cpowalski85
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