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43 Cards in this Set
- Front
- Back
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occupies space and has mass
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matter
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the capapcity to put matter into motion
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energy
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chemical energy is stored in
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bonds
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most useful form of energy in living systems is glucose
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F ATP
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electrical energy requires what
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the movment of charged particles
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give examples of some physical properties
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boiling pt, color, texture, things we can measure with our senses
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one proton weighs one amu?
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T supposedly as does one neutron
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regions around the nucleus in which a given electron is likely to be found at any given time
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orbital
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The atomic number is equal to
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number of protons
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The mass number is
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the sum of the protons and neutrons
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elements that have one or more structural variations
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isotopes
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is atomic weight the same as attomic mass
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no
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what is atomic weight
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is the average of the relative weights of all the isotopes of an element
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atomic weight equals atomic mass
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F, not always, atomic weight is the average of all the isotopes
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heavier isotopes are stable or unstable
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unstable
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what is a half-life
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the time it takes for a radioisotope to lose one half of its radioactivity
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medically how can u use isotopes
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to localize cancerous tissues
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what is a compound
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two or more different atoms combine
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is O2 a compound
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no, its a molecule of that element
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what is a mixture
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two or more components physically intermixed, key physically
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What are the three kinds of mixtures
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solutions, colloids, and suspensions
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mixtures have stuff that has chemically reacted with each other
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no
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solutions are heterogenous
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F
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Are the solutes in solutions visible to the human eye
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No, minute amount of solutes
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Do the solutes in solutions settle out
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no
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molarity is used to express
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the concentration of a solution
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a mole is equal to
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is equal to atomic weight or molecular weight in grams, so if molecular weight is 180.156 a mole of that would equal 180.156 grams!
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one mole of glucose would be, how do you find it
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well one mole of glucose is the molecular weight of 1 molecule of glucose, gotta find out the atomic weight of each atom and add it up, add grams to this final number
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How do you make a one molar solution
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dissolve one mole of glucose in one liter of water, one mole of glucose, get one mole in amu and then convert it to grams, so get 180 amu, change it to 180 grams
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One mole of methane or one mole of oxygen will equal the same number of particles
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True, Avogrados number 6.02 x 1023
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true solutions are transparent
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yes,
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true solutions scatter light
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no
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a colloid is a homogenous mixture
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false
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can a colloid be transparent
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yes or milky
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do the solute particles settle out in a colloid
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no
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do particles in a colloid settle out
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no
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whats a unique property of a colloid
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undergo transformation can change from liquid to a more solid and back, sol gel
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suspesions are homogenous mixtures
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f
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suspsension have smaller particles than colloids
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f, larger
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solutes dont settle out in colloids
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true
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do chemical bonds occur between components of a mixture
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no
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mixtures can be separted by what means
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physical since they are not chemically together, boiling, filtering
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to be homogenous means that
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when taking a sample of something, the sample is the same throughout, doesnt matter from where you take it
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