Term
How many sodium ions surround each chloride ion in this three-dimensional structure?
|
|
Definition
|
|
Term
Describe a covalent bond.
|
|
Definition
A covalent bond is a chemical bond in which two atoms share a pair of valence electrons.
|
|
|
Term
|
Definition
| A molecule is a neutral group of atoms that are joined together by one or more covalent bonds. |
|
|
Term
How many pairs of electrons must two nitrogen atoms share in order for each atom to have eight valence electrons?
|
|
Definition
|
|
Term
Describe a polar covalent bond.
|
|
Definition
A polar covalent bond is a covalent bond in which electrons
are not shared equally
|
|
|
Term
What information is provided by the formula for an ionic
compound?
|
|
Definition
| The formula for an ionic compound describes the ratio of the ions in the compound. The formula indicates which elements the compound contains. |
|
|
Term
What is a polyatomic ion?
|
|
Definition
| A polyatomic ion is a covalently bonded group of atoms that has a positive or negative charge and acts as a unit. |
|
|
Term
What information is provided by the name and formula of a molecular compound?
|
|
Definition
The name and formula of a molecular compound describe the type and
number of atoms in a molecule of the compound.
|
|
|
Term
Describe the general rule for naming molecular compounds.
|
|
Definition
| The most metallic element appears first in the name. |
|
|
Term
Name five general types of chemical reactions.
|
|
Definition
| Synthesis, decomposition, single replacement, double replacement, and combustion |
|
|
Term
Write the equation for the decomposition of calcium carbonate into calcium oxide
and carbon dioxide.
|
|
Definition
|
|
Term
What is a double-replacement reaction?
|
|
Definition
A double-replacement reaction is a reaction in
which two different compounds exchange positive ions and form two new compounds.
|
|
|
Term
What is an oxidation-reduction reaction?
|
|
Definition
| An oxidation-reduction reaction is a reaction in which electrons are transferred from one reactant to another. |
|
|
Term
Calcium reacts with oxygen to form calcium oxide. Which reactant
is oxidized in this reaction?
|
|
Definition
|
|
Term
|
Definition
| Chemical energy is the energy stored in the chemical bonds of a substance. |
|
|
Term
What is an exothermic reaction?
|
|
Definition
| An exothermic reaction is a chemical reaction that releases energy to its surroundings. |
|
|
Term
Where does the energy term appear in the equation for an endothermic reaction?
|
|
Definition
| The energy term appears on the left side. |
|
|
Term
|
Definition
A reaction rate is the rate at which reactants change into products
over time.
|
|
|
