REDOX
What is "LEO the lion says GER" supposed to help you rememebr?
Lose electrons = oxidation
Gain electrons = reduction
In chemistry, the "system" is defined as...
The products and the reactants
This early model of the atom shows electrons existing at quantized energy levels, with higher energy states for the electron as being further from the nucleus
Bohr model
What is the smallest element on the periodic table?
H
Define the acronym VSEPR
What is the oxidation number of iron metal (Fe)?
0
The first law of thermodynamics states...
Energy can be neither created nor destroyed. Any energy that is lost by a system must be gained by the surroundings, and vice versa
This more accurate (and more mathematically complex) model replaced the Bohr Model of the atom
Wave-mechanical/quantum model
Within each group, atomic radius _________ from top to bottom
Increases
A structure with 4 electron domains has what geometry
tetrahedral
What is the oxidation number of carbon in CO2?
+4
An explosion is an example of a _________ reaction
Exothermic
Electron orbitals represent....
Probability density (product of wave function) of where electrons may be found relative to the nucleus
Cations are ________ than their parent ions
Smaller
What molecular geometry does NH3 have?
Trigonal pyramidal
2H2+O2→2H2O
What is oxidized? What is reduced?
O = reduced
H = oxidized
Boiling water is an example of a ________ process
How many electrons can exist in a p sublevel?
6
Ionization energy generally ________ as we move down a group
decreases
Define "dipole"
Difference in electronegativity between two members of a bond (dipole = 0 --> nonpolar)
Cl2+NaBr → NaCl +Br2
Cl = reduced
Br = oxidized
Define specific heat
the heat required to produce a given increase in temperature for a given mass of a substance
Name the neutral element with this electronic structure: 1s22S22p2
C
What group of elements have the largest electron affinities?
Halogens
Is CCl4 polar or non-polar?
Non-polar