33 terms

Chemistry Dr. K Exam

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What is the difference between an element and a compound
An element has only one atom
What is the difference between a suspension and a solution
A suspension is heterogeneous and a solution is homogeneous
What branch of chemistry is the study of energy flow in chemical reactions
Physical
What branch of chemistry would be represented if someone were studying chemical reactions in your body
Biochemistry
N2 is what type of element?
Diatomic
H2O is what type of pure substance
compound
What branch of chemistry would be interested in predicting properties of new man made elements?
theoretical
What type of research would be represented if one were studying how to make more compressible substances for car bumpers (basic, applied, technological)
technological
What phase of matter is described as atoms stripped of their electrons?
plasma
What phase of matter has a definite volume but not shape?
liquid
What phase change in matter is the change from gas to plasma? (melting, freezing, vaporization, condensation, ionization, deionization, sublimation, deposition)
ionization
What Phase change is the change from solid to gas?
sublimation
What phase change is from solid to liquid?
melting
What can happen during a chemical reaction?
break or make bonds or both
How could one separate out the solid part of a suspension? (distillation, centrifugation, evaporation)?
centrifugation
Order of conversion factors
km hm dkm un dm cm mm
for any 1 compound, ratio of atoms is 1 proportion
law of definite proportions
a statement in chemistry: when two elements combine in more than one proportion to form two or more compounds the weights of one element that combine with a given weight of the other element are in the ratios of small whole numbers.
law of multiple proportions
had proposed that all matter is composed of small, indivisible
daltons model of what an atom was
mass loss occurs
alpha
transmutation occurs
...
no change to mass or atomic number
gamma
atomic number goes up by one
beta -
atomic number goes down by one
beta +
proton turns into a neutron
beta +
neutron turns into a proton
beta -
emission that penetrates the least
alpha
emission with best penetration
gamma
up quark changes to down quark
beta +
Electrostatic interactions
ionic
Sea of electrons
metallic
dipole-dipole interaction
covalent
london dispersion forces
non polar covalent