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43 Cards in this Set

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