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chemistry- chapter 4


Groups Coulumns
Periods Rows
Halogens non metals
metals are to the left
simmilarities in eleemens in each group? 1. same group 2.same number of valence electrons 3.Same properites
what makes noble gases so un reactive? Full octet
octet rule atoms of elements want to gain or lose elevtons to have 8 in their outermost e level
ions an atom that has a positive or negative charge
ations negative ions
cations positive ions
metals lose cations
nonmetals gain anions
what takes th emost space in an atom? electrons
as they go down on the periodic table the atomic radius goes up
as they go over on the pt the atomic radius goes down
anions have a _____radius larger
cations have a _____ smaller smaller
ionazion energy electrons required to remove one electron from an atom of an element
electronegativity measure of ability of atom to gain electrons
factors that influence trends size, nuclear charge, elcctron shielding
main group element an element in the sblock or p block
alloy a solid of liquid mixture of two or more metals
nuclear reaction reaction that affects the nucleus of an atom
mendelev organize the periodic table bu increasing atomic mass
mosley- organized the periodic table by increasing by atomic numbers
electron affinity the energy charge that occurs when a neutral atom gains an electron
as the nuclear charge increases across the period the effective nuclear charge ____________ pulling the electrons closer to the nucleus and _______________the size of that atom increasing and decreasing
Created by: babiegrll08



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