432 Midterm Review Ch. 1-8 Ms. Cleary
Conversions/conversion factor problems
Rules for significant figures
Absolute Temperature Scale
Convert Celsius to Kelvin
Homogeneous mixture
Heterogeneous mixture
Problems with exponents
Scientific law
Scientific theory
Hypothesis
Experiment
Atoms
Calculate atomic mass, number of protons, electrons and neutrons
Ionic formula
Isotope
Temperature- measure of kinetic energy
Density
Heat transfer
Energy
Properties of water
Allotrope
Calculate percent by mass
Physical change
Chemical change
Law of Conservation of Mass
Law of conservation of matter
Law of definite composition
Dalton’s Atomic Theory
Rutherford’s gold foil experiment
States of matter: solid, liquid, gas, plasma
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Periodic Table
Noble gas
Chemical symbols
Metals
Metalloids
Nonmetals
p. 139-150:
Electron energy and distance from nucleus
Electrons and bright line spectrum
Relationship between energy and frequency of photons
Red light/blue light energies, frequencies, and wavelengths
Electrons – ground state and excited states
Electron orbitals
Sequence of filling orbitals
Pauli Exclusion Principle
Aufbau Principle
Hund’s Rule
Contributions of:
Lord Kelvin
E. Rutherford
JJ Thomson
Dalton
Ch. 6, 7
Ions and ionization energy pp.170-178
Cation
Anion
Ionic bonds
2
Covalent bonds
Periodic Table trends in EN, ionization energy, atomic radii, ionic radii, and metallic
properties
Dipole moment
Halogen
Alkali metal
Alkaline earth metal
Transition metal
Inner transition metal
Ch. 8 pp. 213-245
Molecule
Molecular compound
Molecular formula
Single covalent bond
Double covalent bond
Triple covalent bond
Structural formula
Coordinate covalent bond
Polyatomic ion
Bond dissociation energy
Resonance structures
Molecular orbital
VSEPR Theory
Hybridization
Tetrahedral angle
Polar covalent bond
Nonpolar covalent bond
Polar molecule
Hydrogen bonds
Network solids
3
Dispersion forces
Be Able to Calculate:
Average atomic mass of elements from their isotopes
Wavelength and frequencies of light
Density problems
432 Midterm Sample Problems
1. A cube of gold-colored metal with a volume of 64cm3 has a mass of 980 g. The
density of pure gold is 19.3 g/cm3. Is the metal pure gold?
_____2. The number of seconds in a 40-hour work week can be calculated as follows:
a. 60 s x 1 min x
1h
=
c. 40 h x 60 min x 60 s =
60 s
60 min
1h
1 min
b. 1 s x 1 min x 40 h__ =
60 s
60 min
d. 40 h x 60 min x
40 h
60 s =
60 min
3. An element X has 3 naturally occurring isotopes. The relative abundance and mass of
each are as follows:
X1 = 78.10%, 23.985 amu.
X2 = 10.13%, 24.946 amu
X3 + 11.17%, 25.983 amu
Calculate the atomic mass of the element and identify the element.
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Work-Out Problems. Show all work! Show all units!
Use the following formulas and values:
c = λν where c = speed of light = 3.0 x 108 m/s
λ = wavelength
ν = frequency
Equantum = hν = Ephoton where h = Planck’s constant = 6.626 x 10-34 J·s
ν = frequency
-1
Hz = s
4. What is wavelength of EM radiation having a frequency of 5.0 x 1012 Hz?
5. What is the speed of EM radiation having a wavelength of 2.25 nm and a frequency
of 1.33 x 1017 Hz?
6. What is the energy of a photon of red light having a frequency of 4.48 x 1014 Hz?
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