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PT Patterns
groups, models, valence
| Term | Definition |
|---|---|
| halogens | elements found in Group 17 of the periodic table; these are very reactive salt forming nonmetals |
| noble gases | elements found in Group 18 of the periodic table; they are very non-reactive |
| alkali metals | elements found in Group 1 of the periodic table; these are the most reactive metals |
| alkaline earth metals | elements found in Group 2 of the periodic table; these are the second most reactive metals |
| valence electrons | the electrons that are in the highest energy level of an atom; these electrons are involved in chemical reactions |
| Lewis structure | a representation of the valence electrons of an atom using dots around the chemical symbol; the number of dots equals the number of valence electrons in the atom; also known as dot structures, dot diagrams, or electron dot diagrams |
| Bohr model | an atomic model which shows electrons moving around the nucleus of an atom in 'orbits' |
| octet rule | a chemical rule that states that atoms tend to gain, lose, or share electrons in such a way that they each have eight electrons in their valence shells, making them stable and non-reactive |
| energy level | the possible locations around an atom where electrons with specific energy values may be found; also known as electron shells or energy shells |
| chemical bond | the force that holds atoms together to form molecules; results from the rearrangement of electrons between atoms |
Created by:
Rita.Rogers
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