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unit 2

the atom and periodic table

TermDefinition
atomic radius total distance from an atoms nucleus to the outermost orbit of an electron
chemical family compounds that share certain physical and chemical characteristics and have a common name
EM spectrum range of all types of EM radiation
electronegativity the tendency for an atom of a given chemical element to attract shared electrons
frequency the rate at which something occurs
ionic radius increases as you move from top to bottom of the periodic table
ionization energy smallest amount of energy required to move the most loosely bound electron
isotopes two or more types of atoms that have the same atomic number
planks constant product of energy multiplied by time
valence electrons electron in the outer shell associated with an atom
wavelength distance between corresponding points of two consecutive waves
alkali metals with hydrogen they constitute group 1
alkaline earth metals 6 chemical elements in group 2
atom smallest unit of ordinary matter that forms a chemical element
atomic # number of protons found in the nucleus
average atomic mass weighted average mass of the atoms
electrons subatomic particle whose charge is negative
electron affinity amount of energy released when an electron is attached to a neutral atom
halogens five or six chemically related elements
mass # total number of protons and neutrons
neutrons subatomic particle with a neutral charge
noble gases class of chemical elements with similar properties
nucleus positively charged center of an atom
oxidation number number assigned to an element in chemical combination
photon quantum of the electromagnetic field
proton positive charged particle
speed of light 299 792 458 m/s
transition metals any of the set of metallic elements occupying a central block
Created by: rubylola
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