Show:
Ionic Bonds
Covalent Bonds
Lewis Structures
Polarity and IMF
Grab Bag
100
What is an ion?
An atom with a charge (positive or negative)
100
What is covalent bond?
The sharing of electrons.
100
What do resonance structures show?
Bonding in molecules or ions that cannot be correctly represented by a single Lewis structure
100
What type of IMF does SeH2 have?
Dipole-Dipole and LDF
100
What would happend to the bond angle if a bonding pair of e-was replaced with a lone pair of electrons in a molecule?
The bond angle would decrease.
200
How is an ionic bond formed?
The transfer of electrons, forming an anion and a cation.
200
How many electrons are there in a single, double, and triple bond?
2, 4, 6 respectively
200
Draw the Lewis structure for phosphate (PO43-)
phosphorous, 4 single bonds, charge and brackets
200
Is the molecule CH2Cl2 polar or nonpolar? What is the molecule's geometry?
Polar, tetrahedral
200
What TYPE would NF3 be?
AB3E
300
What type(s) of elements make up an ionic bond? (e.g. metals, nonmetals, and metalliods)
A metal and a nonmetal
300
What is a polar covalent bond, and what symbol(s) are used to represent it?
A bond where one side is slightly positive and one side is slightly negative, represented with lowecase delta + or -
300
Draw the complete Lewis structure for sulfur dioxide, SO2
sulfur is central, resonance with one double bond
300
List the types of molecules that are nonpolar if all B's are the same.
AB2-6, AB2E3, AB4E2
300
What is the complete symbol to show a dipole?
special arrow with partial negative and partial positive charges
400
What is the difference between a cation and an anion?
A cation is positive and an anion is negative.
400
What type of bond would boron and flourine form?
A polar covalent bond
400
What is the Lewis structure and Type for SeH2
Se with single bonds, AB2E2
400
List the intermolecular forces in order of increasing strength
LDF, Dipole-Dipole, Hydrogen Bonding
400
What causes London dispersion forces?
random motion of electrons, causing temporary weak dipoles
500
What are polyatomic ions?
A group of covalently bonded atoms with a charge.
500
What is the electronegativitiy difference threshold between nonpolar covalent and polar covalent, polar covalent and ionic?
0-0.3=NPC, >0.3-1.7=PC, >1.7=ionic
500
What is the Lewis Structure for cyanide, CN-?
triple bond, lone pair on each, charge and brackets
500
What would have a higher boiling point, CCl4 or CCl2H2? Explain using IMFs?
CCl2H2, it has dipole-dipole interactions, CCl4 only has LDF which is weaker
500
What are intramolecular forces?
forces within a molecule that hold atoms together, ie bonds