| A | B |
|---|
| When 2 or more atoms combine, a ___ is formed. | Molecule |
| If a molecule contains atoms of 2 or more different elements, it is a molecule of a ___. | Compound |
| The forces of attraction that hold molecules together are ___ ___. | Chemical bonds |
| An atom or molecule that has a charge (either positive or negative) is called a(n) ___. | Ion |
| An atom or molecule that has a NEGATIVE charge is called a(n) ___. | Anion |
| An atom or molecule that has a POSITIVE charge is called a(n) ___. | Cation |
| The attraction that holds a cation and an anion together is called a(n) ____ bond. | Ionic |
| The bond that forms when atoms share electrons is a(n) ____ bond. | Covalent |
| If the shared electrons in a bond are a 50-50 split, the bond is ___. | Nonpolar |
| If shared electrons spend more time (but not all) at one end of the molecule than at the other, the bond is ___. | Polar |
| The type of chemical bond that can only occur when polar covalent bonds are present is the ___ bond. | Hydrogen |
| The strongest chemical bond is the ___ bond. | Covalent |
| The weakest chemical bond is the ___ bond. | Hydrogen |
| ___ bonds are most characteristic of organic compounds. | Covalent |
| ___ bonds are most characteristic of inorganic compounds. | Ionic |
| ___ bonds do not form molecules & no electrons are gained, lost, or shared. | Hydrogen |
| Chemical reactions that require the input of energy are descriobed as ____. | Endergonic |
| Chemical reactions that give off energy are described as ___. | Exergonic |
| A chemical ___ is a shorthand way of describing a chemical reaction. | Equation |
| The minimum amount of energy required for a chemical reaction to occur is the ___ energy. | Activation |
| A ___ speeds up the rate of a chemical reaction without itself being changed in the reaction. | Catalyst |
| Increased ___ and increased ___ make a chemical reaction more likely to occur. | Concentration & temperature |
| The ___ act as biological catalysts within cells. | Enzymes |
| Joining two or more ions, atoms, or molecules to form new & large molecules would be described as a(n) ____ reaction. | Synthesis |
| Breaking chemical bonds so that larger molecules are broken down to atoms, ions, or smaller molecules would be described as a(n) ___ reaction. | Decomposition |
| A reaction in which bonds are broken and immediately reformed, producing new molecules, is a(n) ___ reaction. | Exchange |
| A reaction that can do either way, depending on conditions, is a(n) ___ reaction. | Reversible |
