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chemistry test 4-4

QuestionAnswer
stanislao cannizarro method of accurately measuring the relative atomic mass
dmitri mendeleev oragnize elements accoring to theis properties
henry moseley arrage elements accoring to their atomic number
periodic law the chemical and physical properties of the elements are periodic functions of their atomic number
alkalimetals very reactive with oxygen, soft
alkali-earth metals high melting point, harder, stronger, denser, less reactive than alkali
d-block elements transition elements
ion atom or group of bonded atoms that has a positive or negative charge
ionization any process which results in forming an ion
electron affinity energy change when adding en electron
cation positive ion
anion negative ion
valence electrons electrons available in the formation of a chemical compound
electronegativity measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound
atomic radius one-half the distance between the nuclei of identical atoms that are bonded together
how many groups 18
how many periods 7
main-group elements s and p block
most electronegative group halogens
least electronegative group alkali and alkali-earth
why is flourine special in terms of electronegativity it is the most electronegative element. values for other elements are calculated in relation of this value(4)
Created by: cherie09