What is the difference between a lone pair and a bonding electron?
A lone pair has two e- ocuppying the same orbital, while a bonding e- is a single unpaired e-, that can be shared or exchanged with another atom.
100
What is the geometric shape, given the general formula AX3?
What is trigonal planar
100
Draw and determine the polarity of SiBr4
What is tetrahedral & nonpolar
100
Hydrogen bond occurs between hydrogen and ?, ? and ?
What is N, O, and F?
100
Generally, all angular VSPER diagrams are polar or non-polar?
What is polar?
200
Explain the Octect Rule.
The Octet Rule- the idea that a max of 8 e- can occupy orbitals in the valence of an atom. An orbital may be unoccupied or contain one or more e-.
200
Electron repulsion is greatest between two ???????, is less between a lone pair and a bonding pair, and is lowest between two ???????? .
What is two lone pairs and two bonding pairs
200
Draw and determine the polarity of PCl3
What is trigonal pyramid & polar
200
Which of the following substances has a stronger London force sulfur dioxide or nitrogen dioxide?
What is sulfur dioxide - 18 more e-
200
Explain the difference between covalnet, ionic & metallic bonds
Covalent- share e-, neither compound wins e-
Ionic- electron transfer occurs, resulting in a postive ion and negative ion
Metallic- network of positive metal ions and a sea of e-
300
Define the term crystal lattice.
A continuous 3-D pattern of atoms, ions, or molecules in a crystal lattice structure.
300
How many lone pairs and bonding pairs does a VSEPR shape AX2E2 have?
What is 2 lone pairs and 2 bonding pairs.
300
Draw and determine the polarity CH2O
What is trigonal planar & polar
300
What intermolecular forces would be affecting the properties of CH3CONH2 ethanamide?
What is hydrogen, London, dipole-dipole?
300
What is the bonding capacity of C?
What is 4?
400
What is a meniscus?
A Meniscus is the curve in the upper surface of a liquid close to the surface of the container or another object, caused by surface tension. We use the bottom of the curve of meniscus for measuring the amount of liquid in a container.
400
What is the geometric VSEPR shape for silicon disulfide?
What is linear?
400
Draw and determine the polarity of NO2 ^-
What is angular & polar
400
Which has a stronger intermolecular forces, C2H3Cl or C2H5OH? why?
What is C2H5OH, H bonds
400
What is the difference between Cohesion and adesion?
Cohesion- attraction to itself
Adhesion- attraction to other molecules
500
Define the term isoelectronic molecule.
A molecule of simiar shape and the same number of e-
500
According to VSEPR theory which molecule has angular shape?
a. BH3
b. OCl2
c. CO2
d. O2
What is b oxygen dichlorde
500
Draw and determine the polarity C2H5Cl
What is polar
500
List the following bonds in order of force: london, covalent, ionic, hydrogen, dipole dipole, covalent network
LOW (intermolecular) London, Dipole, H bond -- ionic, covalent, covalent network (intramolecular) HIGH
500
What factors affect london forces and dipole-dipole forces?
London- size of atom & shape of molecule
Dipole- attraction between polar molecules.