Chemical Reactions Draw a diagram showing what happens to atoms in a chemical reaction.

Chemical Reactions Draw a diagram showing what happens to atoms in a chemical reaction. What does a scientist observe that indicates a chemical reaction occurred?

Chemical Reactions Draw a diagram showing what happens to atoms in a chemical reaction. What does a scientist observe that indicates a chemical reaction occurred? How do the diagram and observations relate to the law of conservation of mass?

Chemical Reactions Na + O2 Predict the product.

Chemical Reactions Na + O2 What signs are there a chemical reaction took place? How many products are made?

Chemical Reactions Na + O2 Na2O Draw what the atoms are doing. Relate to the law of conservation of mass

Types of Chemical Reactions

Synthesis

Synthesis Reactions

A = Red B = Blue C = Green D = Yellow Type of Reaction Definition  Equation Synthesis Two or more elements or compounds combine to make a more complex substance A + B → AB A = Red B = Blue C = Green D = Yellow

Decomposition

Decomposition Reactions

into simpler substances Type of Reaction Definition  Equation Synthesis Decomposition Two or more elements or compounds combine to make a more complex substance A + B → AB AB → A + B Compounds break down into simpler substances A = Red B = Blue C = Green D = Yellow