Topic: Chemical Formulas Essential Question: What is the law of conservation of mass, and how does it apply to chemical equations?

Topic: Chemical Formulas Essential Question: What is the law of conservation of mass, and how does it apply to chemical equations? Chemical formulas Are written using an elements chemical symbol from the periodic table Used to identify how many atoms of each element are present

H20 Chemical formula for water Topic: Chemical Formulas Essential Question: What is the law of conservation of mass, and how does it apply to chemical equations? Chemical formula for water H20 Subscript- tells you how many atoms per element there are There are 2 Hydrogen atoms and 1 Oxygen atom in water

3H20 Chemical formula for water Topic: Chemical Formulas Essential Question: What is the law of conservation of mass, and how does it apply to chemical equations? Chemical formula for water 3H20 Coefficient- tells you how many molecules there are There are 3 molecules of water

3H20 Chemical formula for water Topic: Chemical Formulas Essential Question: What is the law of conservation of mass, and how does it apply to chemical equations? Chemical formula for water 3H20 Coefficient- you multiply the coefficient by the subscript to get the number of atoms per element There are 6 hydrogen atoms and 3 oxygen atoms

Topic: Chemical Formulas Essential Question: What is the law of conservation of mass, and how does it apply to chemical equations? Law of conservation of mass During a chemical reaction, no matter is created or destroyed, it is just rearranged 2H2 + O2  2H2O +  The chemical equation is balanced H H H H O H H O O O H H

1.) Take an element inventory for each side of the equation Topic: Chemical Formulas Essential Question: What is the law of conservation of mass, and how does it apply to chemical equations? How to see if a chemical equation is balanced 2H2 + O2  2H2O 1.) Take an element inventory for each side of the equation 2.) Write down the number of atoms for each element 3.) If the numbers match, then it is balanced H - H- O- 4 4 2 2

Now take some time… Take 2 minutes to go over your notes and highlight or underline the main ideas that answer the essential question, you should not highlight everything: Essential Question: What is the law of conservation of mass, and how does it apply to chemical equations?

Time to use the left hand column You will be writing your own questions from now on! To get you started, verbs will be provided

Topic: Chemical Formulas Essential Question: What is the law of conservation of mass, and how does it apply to chemical equations? Chemical formulas Are written using an elements chemical symbol from the periodic table Used to identify how many atoms of each element are present Choose one verb to write your question: Define Describe Compare Explain

H20 Chemical formula for water Topic: Chemical Formulas Essential Question: What is the law of conservation of mass, and how does it apply to chemical equations? Chemical formula for water H20 Subscript- tells you how many atoms per element there are There are 2 Hydrogen atoms and 1 Oxygen atom in water Choose one verb to write your question: Define Describe Compare Explain

3H20 Chemical formula for water Topic: Chemical Formulas Essential Question: What is the law of conservation of mass, and how does it apply to chemical equations? Chemical formula for water 3H20 Coefficient- tells you how many molecules there are There are 3 molecules of water Choose one verb to write your question: Define Describe Compare Explain

3H20 Chemical formula for water Topic: Chemical Formulas Essential Question: What is the law of conservation of mass, and how does it apply to chemical equations? Chemical formula for water 3H20 Coefficient- you multiply the coefficient by the subscript to get the number of atoms per element There are 6 hydrogen atoms and 3 oxygen atoms Choose one verb to write your question: Define Describe Compare Explain

Topic: Chemical Formulas Essential Question: What is the law of conservation of mass, and how does it apply to chemical equations? Law of conservation of mass Choose one verb to write your question: Define Describe Compare Explain During a chemical reaction, no matter is created or destroyed, it is just rearranged 2H2 + O2  2H2O +  The chemical equation is balanced H H H H O H H O O O H H

1.) Take an element inventory for each side of the equation Topic: Chemical Formulas Essential Question: What is the law of conservation of mass, and how does it apply to chemical equations? How to see if a chemical equation is balanced 2H2 + O2  2H2O 1.) Take an element inventory for each side of the equation 2.) Write down the number of atoms for each element 3.) If the numbers match, then it is balanced Choose one verb to write your question: Define Describe Compare Explain H - H- O- 4 4 2 2

Time to use the left hand column You will now write questions on your own using question starters that are provided

Now let’s write a summary Look at each question you wrote on your own, and answer each question in a complete sentence.