1. Warm-Up Write a word equation to represent the following situation: – Ammonia is an important chemical in fertilizer. It is produced by reacting hydrogen gas with nitrogen gas.

2. Chemical Equations LG: I can write word equations and chemical equations to represent chemical reactions

3. Recall: Formulas for Elements Most elements can be represented with the element symbol: ie. Sodium  Na BUT there are 7 gas elements that always travel in pairs: Hydrogen Iodine Nitrogen ChlorineBromineOxygen Fluorine HINClBrOF!

4. Chemical Equations Hydrogen gas reacts with oxygen gas to produce water Description Word Equation Chemical Equation

5. Chemical Equations Sodium reacts with chlorine gas to produce sodium chloride Description Word Equation Chemical Equation

6. Chemical Equations Magnesium hydroxide and hydrogen gas are produced when magnesium reacts with water Description Word Equation Chemical Equation

7. Video: Bill Nye Chemical Recations Answer the following while you watch the video: – What is a chemical reaction? – How do you know a chemical reaction has taken place?