★ Must-know
Further detail
CGPTHO: Color, Gas, Precipitate, Temperature, Heat/light, Odor
★ Must-know
📌 The reactivity of the metals in the oxygen examples decreases in the order magnesium > iron > copper.
Further detail
1. What distinguishes a chemical reaction from a physical change?
2. Which observation is one possible sign that a chemical reaction has occurred?
3. Which process is an example of a synthesis reaction?
What happens to bonds during a chemical reaction?
Bonds between reactant molecules break and new bonds form between product molecules.
What is produced by a chemical reaction?
Substances with different properties from the reactants.
Which six signs can indicate a chemical reaction?
Color change, gas evolution, precipitate formation, temperature change, heat and light emission, or odor change.
Why is burning magnesium in air a chemical reaction?
Because magnesium forms magnesium oxide with different properties.
What is a synthesis reaction?
Two or more substances combine to form one new compound.
What is the chemical equation for copper reacting with oxygen when heated?
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