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ps stack 1
| Term | Definition |
|---|---|
| atom | the smallest particle of an element that still retains the properties of an element. |
| atomic number | number of protons in an atoms nucleus |
| average atomic mass | weighted - average mass of the mixture of an elements isotopes. |
| electron | particle surrounding the center of an atom and have a charge of -1 |
| electron cloud | area around the nucleus of an atom where the atoms electrons are most likely to be found. |
| electron dot diagram | uses the symbol for an element and dots representing the number of electrons in the elements outer energy level |
| group | vertical column in the periodic table |
| isotope | atom of the same element that have a different number of neurons |
| mass number | sum of the number of protons and neurons in an atoms nucleus |
| neutron | neutral partial, composed of quarks, inside the nucleus of an atom |
| nucleus | positively charged center of an atom that contains protons and neurons and its surrounded by a cloud of electrons |
| period | horizontal row in the periodic table. |
| periodic table | organized list of all known elements that are arranged by increasing atomic number and by changes in chemical and physical properties |
| proton | particle, composed of quarks, inside the nucleus of an atom that has a charge of 1+ |
| quark | particle of matter that makes up protons and neutrons |
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