Studied by 18 peopleWhat is the safety shower used for?
to wash chemicals off a person in the event of a chemical spill.
What is the eye wash station used for?
washing off chemicals or substances that might have splashed into an individual's eyes before he or she can seek further medical attention.
What is the fire extinguisher used for?
to extinguish a combustible metal fire
What is the fire blanket used for?
to extinguish small fires.
What are goggles used for?
protection against chemical splash hazards, use of concentrated corrosive material, and bulk chemical transfer
What precautions should be taken when using a Bunsen Burner?
Always inspect the Bunsen burner, tubing, and gas valve before use. Tie back long hair and do not wear loose long sleeves.
Qualitative Numbers
descriptive, characteristics
Quantitative Numbers
numbers, frequencies
All non-zero numbers
significant
Zeros between two non-zero digits
significant
Leading zeros
not significant
Zeros to the right of the decimal
significant
Zeros in a whole number with the decimal shown
significant
What do you do if a number is less than .01 or greater than 1000?
Convert to scientific notation
Physical properties
density, color, hardness, melting and boiling points, and electrical conductivity.
Chemical properties
flammability, toxicity, acidity, reactivity, and heat of combustion
Intensive properties
a property of matter that depends only on the type of matter in a sample and not on the amount. Color, temperature, and solubility are examples
Extensive properties
a property that depends on the amount of matter in a sample. Mass and volume are examples
density formula
m/v
physical change
boiling, melting, freezing, bending, breaking
chemical changes
digesting, burning, rusting, rotting
John Dalton
atomic theory
Mendeleev
gaps existed, in order of atomic mass
JJ Thomson
cathode ray tube, electron discovery
Rutherford
gold foil experiment
Moseley
atomic number order, elements w similar properties are in regular intervals in the table
Bohr
quantum mechanics, “electrons only exist in specific places,” planetary model
Chadwick
neutron discovery
atomic #
number of protons
mass #
protons+neutrons
isotope
same # of protons but different # of neutrons
ion
a charged atom or molecule
AAM
Mass^1(percent 1)+ Mass 2(percent 2)…
vertical row
group
horizontal row
periods
neutral atom
no charge
absolute zero
lowest possible temp; 0C; 273K
Charles Law
V1T1=V2T2
Gay Lussac Law
P1T1=P2T2
Boyles Law
P1V1=P2V2
cooling curve
exothermic (releases heat)
heating curve
endothermic (absorbs heat)
solid
definite shape & volume, NOT easily compressed, tightly packed particles
liquid
no definite shape, definite volume, NOT easily compressed, fills the shape of the container
gas
NO definite shape & volume, easily compressed, lots of particle space
Q=
mc(Delta)T
Note
Flashcard