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chemistry2012

spring final 2012

QuestionAnswer
name the 3 sub-atomic particles and their charges. neautron- (O) proton- (+) electron- (-)
the number of protons in the nucleaus of an element atomic number
smallest paricle of an element that retains the properties of that element? atom
positivley charged subatomic particle? proton
negatively charged subatomic particle? electron
subatomic particle with no charge neautron
weighted average of the mass of the atoms in a naturally occuring sample of an element. mass number
what are valence electrons? electrons on the outer most shell
how can the total valenece electrons for an element be determined? by the group number
how many valence electrons does a sodium, silicon, beryllium and oxegen atom have? sodium-1 silicon-4 beryllium-2 oxegen-6
what is the relation between the number of velence electrons in atoms of an element and the elements placement in the periodic table? valence electron determines groups. farther over you go more valence electrons you have.
what are 4 properties of a metal? 1)ductile 2)malleable 3)lust 4)conducts electricty
what are 4 properties of nonmetals? 1)not malleable 2)not ductile 3)not lust 4)cant conduct electricity
what is a metalloid? combonation of both a nonmetal and metal
products 2.A substance produced during a natural, chemical, or manufacturing process: "waste products".
reactants A substance that takes part in and undergoes change during a reaction
Created by: 100003063579565
 

 



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