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Chapter 17 Sec 1-3
| Term | Definition |
|---|---|
| Atom | the smallest particle of an element that still retains the properties 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 a n 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 atom where the atom's electrons are most likely to be found |
| Atomic Number | total distance an object travels divided by the total time it takes to travel that distance |
| mass number | sum of the number of protons and neutrons in an atom's nucleus. |
| isotope | atoms of the same element that have different numbers of neutrons |
| Average atomic mass | weighted average mass of the mixture of an element's 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 dots representing the number of electrons in the element's outer energy level |
| Period | horizontal row in the periodic table the are arranged by increasing atomic number and by changes in chemical and physical properties |
Created by:
reaginicfiddle4
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