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Chemistry Quiz #2
| Question | Answer |
|---|---|
| Why do aroms form chemical bonds? | They want to become stable and fill their outer shell with valence electrons |
| Valance Electrons | Electrons in the outer shell |
| Ion | A positive or negative charged atom |
| Ionic bond | a bond made by the transfer of electrons |
| Covalent bond | a bond made by sharing electrons |
| Chemical reaction | when bonds are made or broken to form new substances |
| What might indicate the occurrence of a reaction (4 things) | A spontanious color change, a spontanious production of energy such as heat or light, the production of precipitate, the formation of a gas |
| What is a chemical reaction? | A process that changes 1 or more substances into another substance |
| What is a chemical equation? | A short-hand way of showing whats happening during a chemical reaction |
| Reactant | A beginning material. Written before the arrow |
| Product | An ending material. Products are written after the arrow. |
| A balance equation | When writing a chemical equation the number of atoms on the reactant side MUST equal the number on the product side? |
| Mass/energy (3) | cant be created, cant be destroyed, can only change |
| What factors affect the rate a reaction takes place? (4) | Temperature, surface area, concentration, add of catalyst. |
Created by:
Teddy12345
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