General Chemistry Terms
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19 terms
Terms | Definitions |
|---|---|
 Element | a pure substance that cannot be broken down into other substances by chemical or physical means |
| Atomic number | the number of protons in the nucleus of an atom |
| Mass Number | the total number of protons and neutrons in the nucleus of an atom |
| Neutron | a subatomic particle with no charge |
| Orbital | a region in an atom where there is a high probability of finding electrons |
| Periodic Table | A table that shows the elements, their atomic number, symbol, and average atomic mass; elements with similar chemical properties are grouped together. |
| Family | (biology) a taxonomic group containing one or more genera |
| Lewis Diagram | Diagram of an atom, ion or molecule in which each dot represents a valence electron |
| Phases of matter | solid, liquid, gas, plasma |
| compound | substance containing two or more elements chemically combined in a fixed ratio |
| atomic mass | Total mass of the protons and neutrons in an atom, measured in atomic mass units |
| proton | subatomic particle with a single positive electrical charge |
| electron | subatomic particle with a single unit of negative electric charge (-) |
| valence | the number of electrons in the outermost energy level of an atom |
| Group Number | Number of valence electrons in an atom can be determined by this on the periodic table. |
| Bohr Diagram | diagram representing the electronic structure of an element, that comprises electrons in a series of concentric circles |
| Elemental Symbol | A one or two letter representation of an element |
| atom | smallest particle of an element |
| molecule | two or more atoms held together by covalent bonds |
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