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PT Patterns

groups, models, valence

TermDefinition
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