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Atoms vocab
vocab for atoms
| Term | Definition |
|---|---|
| atom | the smallest particle of an element that still retains the properites of the element |
| nucleus | positively charged center of an atom that contains protons and neutrons and is surrounded by a cloud of electrons |
| proton | particle, composed of quarks inside the nucleus of an atom that has a charge of 1+ |
| neutron | neutral particle, composed of quarks, inside the nucleus of an atom |
| Electron | particles surrounding the center of an atom that have a charge of 1- |
| Quark | particles of matter that make up protons and neutrons |
| Electron cloud | area around the nucleus of an atoms where the atoms electrons are most likely to be found |
| Atomic number | number of protons in an atoms nucleus |
| mass number | sum of the number of protons and neutrons in an atoms nuclues |
| isotope | atoms of the same element that have different number of neutrons |
| average atomic mass | weighted-average mass of the mixture of an elements isotopes |
| periodic table | organized list of all known elements that are arranged by increasing atomic number and by changes in chemical and physical properties |
| group | vertical column in the periodic table |
| electron dot diagram | uses the symbol for an element and dot representing the number of electrons in the elements outer level |
| period | the amount of time it takes one wavelenght to pass a fixed point; expressed in seconds. Horizontal row is the periodic table |
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