| A | B |
|---|
| What kind of reaction / change occurs when you activate an instant cold pack, which mixes water with a chemical, causing the pack to become very cold? | endothermic reaction |
| What is a subscript? | The small number written to the lower right of an element |
| What is the coefficient? | The whole number written before a compound |
| What is endorthermic? | A reaction where energy is taken IN (the product is colder) |
| What is exothermic? | A reaction that gives OUT energy (or heat) |
| What are reactants? | The substances present BEFORE the reaction occurs (left side of the arrow) |
| What are products? | The substances present AFTER the reaction has taken place (right side of arrow) |
| What is a physical change? | A change where the substance DOES NOT change. |
| What is a chemical change? | Change that DOES produce a new substance with new properties. |
| What type of reaction creates a single product from two or more reactants? | Synthesis |
| What type of reaction breaks a single product down into two or more simpler products? | Decomposition |
| Family/Group | A vertical column on periodic table that shares similar chemical properties |
| Period | Horizontal row on periodic table that tells you how many energy levels exist in that atom |
| Cation | An atom that has lost electrons, giving it an overall positive charge |
| Anion | An atom that has gained electrons, giving it an overall negative charge |
