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LSH PScience 19B
Periodic Table
Term | Definition |
---|---|
Atomic Number | The number of protons in the nucleus of an atom |
Mass Number | The number of protons and neutrons in the nucleus of an atom |
Isotope | A version of an atom with a different mass |
Average Atomic Mass | The average mass of all the isotopes that exist of a given element |
Periodic Table | An arrangement of all the elements by atomic number and patterns of chemical properties |
Group | A vertical arrangement on the periodic table of elements with similar chemical properties |
Electron Dot Diagram | A way of representing the valence electron configuration of an element |
Period | A horizontal arrangement of elements on the periodic table |
Valence Electrons | The highest energy electrons responsible for reactivity (outer "shell" electrons) |
Atomic Shell Model | A way of representing atomic structure with electrons in "shells" surrounding nucleus according to energy level |