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chemistry2012
spring final 2012
| Question | Answer |
|---|---|
| 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 |
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