Chemical Properties Physical and Chemical Changes

Read p.50 Define Chemical Property A property of matter that describes a substance’s ability to participate in chemical reactions What is flammability? Ability of a substance to burn What is reactivity? Ability of 2 or more substances to combine and make 1 or more new substances

Read p.51 What is a characteristic property? It is a property that are most useful in identifying a substance Are chemical properties easy to observe? Not always What are the physical and chemical ways that a nail can change? Bending shape and reactivity with oxygen causing rust

Read p.52 What is a chemical change? It is when one or more substances are changed into new substances that have new and different properties Draw figure 3 on page 52 Chemical Changes

Read p.53 What are some examples that a chemical change took place? Smell, heat, color change, bubbling, fizzing, foaming, sound, light, heat or cold would all be examples. Is it easy to reverse a chemical change? No

Read p What is the most important question to ask when trying to decide if a physical or chemical change has happened? Did the composition change? What is the composition? The way that the matter is arranged in the object and the type of matter it has

p Does a physical change cause the composition of a substance to change? No Write and answer questions 2, 4, and 5 on page 55