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5.MA2AtomicModels

atoms, models, electrons

TermDefinition
isotope forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei; (differ in relative atomic mass but not in chemical properties)
valence electron electrons located in the outer energy level or shell of the electron cloud
Bohr's Model model of the atom that includes all the subatomic particles and their number and location
Lewis Dot Model model of the atom that includes the symbol in the center and then dots around it representing the VALENCE electrons
chemical symbol 1-2 letter representation of an element's name (either first letter, 2 letters of word or Greek/Latin name)
ion charged atom (that has either gained or lost electrons)
metal category of elements on left side of periodic table; shiny, ductile, malleable, and strong
non-metal category of elements on the right side of the periodic table; opposite properties of metals
metalloid category of elements along the "zigzag" between metals and nonmetals; have properties of both
group/family column in the periodic table; shared properties
period row in the periodic table
coefficient in a chemical formula, the number in front of the symbol that tells how many MOLECULES of that compound there are
subscript in a chemcial formula, the SMALL number below telling how many atoms of that particular element are present
Created by: jparsons