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Chem Exam
Semester 1
40
Chemistry
9th Grade
12/15/2010

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Term
distilation
Definition
seperation based on boiling pt
Term
Filtration
Definition
seperation based on solubilty
Term
Decanting
Definition
speration based on density
Term
Evaporating
Definition
seperation based on boiling pt but one component is not recovered
Term
Chromotography
Definition
based on affinity for a solvent
Term
atomic #
Definition
# of protons
Term
atomic mass
Definition
relative mass of an atom
Term
Mass #
Definition
Protons +neutrons
Term
Allotrope
Definition
atoms of the same element arranged in different ways, different forms of the same element
Term
Hyphen notation
Definition
Element-Mass #
Term
Nuclear symbol
Definition

Mass #                              

Protons Element

Term
Isotope
Definition
two or more atoms w/ the same atomic # but different mass #s
Term
Polyatomic Ion
Definition
an ion w/ more than one atom in it
Term
Acid
Definition
proton donor, molecule that produces H ions when dissolved in water
Term
Ion
Definition
atoms/group of atoms that have a net charge, formed when elctrons are lost or gained
Term
Mass
Definition
kilogram
Term
Length
Definition
meter
Term
Amount of Matter
Definition
mole
Term
Time
Definition
seconds
Term
Volume
Definition
liter
Term
Temperature
Definition
Kelvin
Term
kilo
Definition
1,000
Term
centi
Definition
.01
Term
Milli
Definition
.001
Term
Micro
Definition
.0000001
Term
Accuracy
Definition
relative closeness to the true
Term
Precision
Definition
being able to reproduce measurements
Term
SigFig Rules
Definition

nonzero- significant

sandwhiched-significant

leading zeros- not significant

trailing zeros- significant when right of the decimal

Term
Molecular
Definition
actual # of atoms
Term
Empirical Formula
Definition
has simplest ratio of atoms
Term
Bronstead Base
Definition
anything that accepts a proton
Term
Arrhenius Base
Definition
something with an OH ion
Term
HCl
Definition
hydrochloric acid
Term
HBr
Definition
Hydrobromic acid
Term
HI
Definition
Hydroiodic acid
Term
HNO3
Definition
Nitric Acid
Term
HClO4
Definition
Perchloric Acid
Term
H2SO4
Definition
Sulfuric Acid
Term
7 Diatomic Elements
Definition
  • Hydrogen (H2)
  • Nitrogen (N2)
  • Oxygen (O2)
  • Fluorine (F2)
  • Chlorine (Cl2)
  • Iodine (I2)
  • Bromine (Br2)
Term
Metal Oxide and Water make a
Definition
BASE
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