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Chemistry Quiz 3
| Question | Answer |
|---|---|
| What is a binary covalent compound made of? | 2 nonmetals |
| 1 atom | Mono- |
| 2 atoms | Di- |
| 3 atoms | Tri- |
| 4 atoms | Tetra- |
| 5 atoms | Penta- |
| 6 atoms | Hexa- |
| 7 atoms | Hepta- |
| 8 atoms | Octa- |
| 9 atoms | Nona- |
| 10 atoms | Deca- |
| What does Pauling's scale measure? | electronegativity of elements |
| What happens to electronegativity when going left to right across a row on the periodic table? | increases |
| What happens to electronegativity when going from top to bottom of a column on the periodic table? | decreases |
| Most electronegative element? Least? | Fluorine, Francium |
| What electronegativity is Nonpolar covalent? | <0.5 |
| What electronegativity is Polar covalent? | 0.5-2.0 |
| What electronegativity is Ionic? | >2.0 |
| What are Polyatomic molecules? | more than 2 atoms in structure |
| Rules for how many bonds common elements form that increases by one each letter? | HONC (hydrogen, oxygen, nitrogen, carbon) |
| How can you figure out how many covalent bonds a nonmetal forms? | 8-group number |
| Can compounds contain both ionic and covalent bonds? | yes |
| What are Polyatomic Ions? | groups of covalently bonded atoms with a charge |
| Which do we name first in Polyatomic Ions? Anions or cations? | Cations (positive) |
| How are resonance structures represented? | double centered arrow |
| What is an atom or molecule with an unpaired electron known as? | free radical |
| What are the two main factors that affect the taste of food? | shape of molecule and charge distribution within the molecule |
| What are the five molecular shapes according to the VSEPR Theory? | linear, bent, trigonal planar, trigonal pyramidal,tetrahedral |
| What is the shape when there are zero lone pairs, 2 electron sets? | linear |
| What is the shape when there are zero lone pairs, 3 electron sets? | trigonal planar (triangular) |
| What is the shape when there are zero lone pairs, 4 electron sets? | tetrahedral |
| What is the shape when there is one lone pair, 4 electron sets? | trigonal pyramidal |
| What is the shape when there is one lone pair, 3 electron sets? | bent |
| What is the shape when there are 2 lone pairs, 3 electron sets? | bent |
| Is water (H2O) nonpolar or polar? | polar |
| Is carbon dioxide (CO2) polar or nonpolar? | nonpolar |
| What are forces between molecules? | intermolecular forces |
| What are forces within molecules such as covalent bonds? | intramolecular forces |
| What three elements can hydrogen form a very strong bond with? | Nitrogen, Oxygen, Fluorine |
| Strongest to weakest forces | Ionic forces>hydrogen bonding>dipole forces>dispersion forces |
| How do ionic substances dissolve in water? | ion-dipole interactions |
| How do polar molecular substances dissolve in water? | hydrogen bonding or dipole dipole interactions |
| Type of bonds in order of increasing electronegativity | nonpolar covalent, polar covalent, ionic |
| _____ is on the left and ______ is on the right in a chemical equation | reactants, products |
| What is Avogadro's number? | 6.02 times 10 to the 23rd power |
Created by:
alynch4