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Elements Terminology
facts and information about the elements and there set up
| Term | Definition |
|---|---|
| Valence Electrons | Electrons in the outer level or sub-level that are involved with reactions. |
| Atomic number | Number of protons, usually equal to the number of electrons. |
| Atomic Mass | Also refereed to as Mass number, is the number or protons plus neutrons. |
| Isotopes | Same element with a different number of nuetrons |
| Average Atomic Mass | Average mss of all isotopes of an element |
| Half-life | Amount of time it takes for half of a sample of a isotope to break down into other elements |
| Carbon Dating | using the decay of C-14 to determine the age of a organic substance |
| Dmitri Medeleev | Russian chemist in the 1800s, designed the first periodic table |
| Grous or families | Columns on the periodic table, elements in a group have similar properties |
| Electron Dot structure | shorthand method of showing the number of valence electrons |
| Periods | Rows on the periodic table |
| Ductile | can be drawn into wires |
| Malleable | easily bent or pounded into sheets |
| Metalloids | Found along the stair step line of the periodic table, properties lie somewhere between metals and non metals. |
| Diatomic elements | Elements that are almost never found alone in nature, two atoms o the same element are bounded together |
Created by:
miae
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