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Chem 2 Midterm Fall21
Terms in this set (53)
7 lab safety rules
Must wear lab coat and goggles in the lab
Must wear close toed shoes in the lab
Must wear long, loose, cotton clothing
Report any incident, no matter how small
Never play in the lab
Never work alone in the lab
Never put anything in your mouth in the lab
What is paper chromatography?
a technique used to separate a mixture into its component molecules
What does VSEPR stand for?
Valence Shell Electron Pair Repulsion
What is the VSEPR theory?
a theory for predicting molecular shapes based on atoms and ion pairs being AS FAR AWAY AS POSSIBLE from each other.
(T/F) Lone pairs have the biggest repulsion.
Why do atoms bond?
To become more stable. chemical bonds form because they have lower potential energy.
types of repulsions
nucleus to nucleus
electron to electron
nucleus to electron
Formed when one or more electrons are transferred from one atom to another (metal and nonmetal)
A chemical bond that involves sharing a pair of electrons between atoms in a molecule (two nonmetals)
a bond formed by the attraction between positively charged metal ions and the electrons around them
5 electron geometries
linear, trigonal planar, tetrahedral, trigonal bipyramidal, octahedral
trigonal planar molecular geometries
trigonal planar and bent
tetrahedral molecular geometries
tetrahedral, trigonal pyramidal, and bent
trigonal bipyramidal molecular geometries
trigonal bipyramidal, seesaw, t-shaped, and linear
octahedral molecular geometries
octahedral, square pyramidal, square planar, t-shaped, linear
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