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| 2+ (gets rid of 2 protons and the mass is down by 4) Ex 238/92 U to 234/90 Th reason... 2 protons and 2 neutrons are given off |
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| 1- (gains one proton) Ex 234/90 Th to 234/91 Pa reason... a neutron changes into a proton |
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| 0 reason.... there is an energy change only. |
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| off targeted area but results are similar |
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| King Henry Died Unexpectedly Drinking Chocolate Milk |
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| Kilo, Hecto, Deca, Unit, Deci, Centi, Milli (when you go left from the right,number gets bigger. when you Right from left, number gets smaller) |
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| Law of conservation of mass |
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| mass can neither be made or destroyed |
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| the smallest component of an element having the chemical properties of the element, consisting of a nucleus containing combinations of neutrons and protons and one or more electrons bound to the nucleus by electrical attraction; the number of protons determines the identity of the element. |
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| one of a class of substances that cannot be separated into simpler substances by chemical means. |
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| Composed of 2 or more elements |
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| How to find density mass volume |
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Mass
Density Volume (the triangle D= M/v M=D*V
V=M/D |
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| does not result in a new substance. ex ice to water |
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| a change that creates a new substance |
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(current) . . .
. + .
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| = different mass b/c of neutrons from the original element |
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metals to nonmetals
name: metal then nonmetal and add ide to the end of nonmetal |
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| ex mg(NO3)2 write as magnesium nitrate |
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Ex. FeCl2 Iron (||) Chloride
reason. iron is 2+ and chloride is 2-. bc there are two chloride, u need to equal it out so that there are two iron |
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| mass in grams} molar mass {moles} 6.02*10^23 {number of particles} |
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| mass in grams} molar mass {moles} 6.02*10^23 {number of particles} |
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| ex. co2 c=12.01 0=15.99 0=15.99 add them up and there is ur molar mass |
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