Atom - smallest particle into which an element can be divided and still have the properties of that element, Proton - positively charged particle that is located in the nucleus of the an atom; this determine the IDENTITY of the atom; 1AMU, Neutron - A particle with no charge that is located in the nucleus of an atom; 1 AMU, Electron - A negatively charge particle that is located outside the nucleus of atom in electron clouds or shells; about 0 AMU, Nucleus - Center of an atom containing the protons and neutrons which make up most of the mass of an atom, Electron cloud or shell - region in side an atom where electrons may be found, Energy Level - A specific area in an atom that holds a specific number of electrons; 1st level 2, 2nd level 8; 3rd level 8; remember 8 IS GREAT!, Valence Electron - The electrons in the outermost energy level of an atom that determines the elements REACTIVITY, Atomic Number - the number of PROTONS in the nucleus of an atom, calculating neutrons - atomic number- atomic mass, Periodic Table - a chart where all of the elements are arranged according to their atomic number and properties, Group - the VERTICAL column (groups UP!) which tells you the number of VALENCE electrons of an atom, Periods - the horizontal row on the periodic table that tells you the number of electron shells each element has, metals - elements that are shiny, ductile, malleable and a good conductor found on the left and middle of the periodic table, nonmetals - exact opposites of metals; they are dull (not shiny), brittle (breaks easily); and is a poor conductor, metalloid - has properties of both metals and nonmetals; the inbetweenies, semi conductors, malleable - ability to pound into thin sheets, ductile - ability to be pulled into wires, luster - how shiny an object is; how light is reflected off the object, conductivity - ability to allow heat or electricity to pass through, physical property - property that can be observed without changing the substance, chemical property - property based on a substance ability to REACT with another substance, Chemical Reaction - a change that takes place when two or more substance interact to form a NEW substance; Girls (gas production); love (light production); their (temperature change); cell (unexpected color change); phones (precipitate); on (odor/smell); now (new substance),

Properties of Atoms Vocabulary Practice

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