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studysuccess
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what's the relationship between the temperature of gas and its volume?
Volume increases with temperature.
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What is the smallest particle of an element that can exist?
an atom
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What's the most abundant element in Earth's crust, atmosphere, and oceans?
oxygen
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Metal or non-metal:
lustrous, malleable, conduct heat and electricity, ductile, high density, high melting point.
metal
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metal or non-metal:
dull, brittle, poor conductors of heat and electricity, non-ductile, low density, low melting point
non-metal
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What type of element has characteristics between metals and non-metals, and list
metalloids (don't need to know metalloids): Boron, silicon, Germanium, Arsenic, Antimony (SB), & Tellurium.
(Big sisters get arsenic sober teddies)
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What group of elements are nonreactive and found as elements in nature
noble gasses, because they have a full shell, they're least reactive and found uncombined in nature.
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List 7 diatomic molecules:
I, H, N, F, Cl, O, Br
(I have never found clubs on board).
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What kind of bond do t non-metals make
a molecular/covalent bond
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what kind of bond does a metal and nonmetal make
ionic bond
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how are molecules held together
by shared electron
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how are ionic compounds held together
negative and positive force
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Do metals form cations or anions, and do they have a negative or positive charge?
Metals form cations with a positive charge
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What is the difference between a pure substance and homogeneous mixture
the pure substance has a fixed compound formula, and can not be broken down without undergoing chemical change.
The mixture can be separated without undergoing chemical change, and has varying composition.
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What is an alloy
a mixture of metals (e.g. steel is an alloy of iron).
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what is a percipitate
the deposit of a substance in solid form.
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What is a filtrate
the liquid that has passed through a filter.
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what is a reactant
the starting substances to needed to undergo change
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what is the product
the substance produced in a reaction
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Law of conservation:
Energy/mass can not be created or destroyed.
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Potential energy is? List example
- potential energy stored energy.
- (e.g. gasoline burning is potential energy in the chemical bonds breaking to form kinetic energy).
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What is the relationship of the following: Kcal, J, Cal, and cal?
- Cal and Kcal are 1000X cal.
- 1 cal= 4.184 Joules, which is the amount of energy needed to increase the temp of H2O 1 degree (like specific heat is for other elements).
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temperature is
the intensity of thermal energy (how hot the system is) that is proportional to it's kinetic energy.
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what is heat:
heat is the amount of energy transfer.
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formula for heat
(Mass g)X(Specific heat)(Delta T)
*Delta T is the final temp minus the initial temp.
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