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METALS AND OXYGEN
Yohann Gálvez
Created on August 22, 2022
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Transcript
Science 8. Pages 122-123
Ms Yohann Galvez / Ms Melisa Rivera / Ms Cymttia Martinez
METALS AND OXYGEN
WEEK 7:
REACTIVE
STATE SYMBOLS
KEY WORDS
Use state symbols in balanced formula equations
LEARNING OBJECTIVES
Compare the reactions of different metals with oxygen.
LET'S WATCH THIS VIDEO
1. What do we get when metals react with oxygen?2. Write the name of three oxides from the video. 3. Why some metals don't need or need heat to react with oxygen?
gold
copper
zinc
Magnesium reacts with oxygen even when you do not heat it. If you leave magnesium in the air, its surface atoms react with oxygen. This forms a thin layer of magnesium oxide.
HOW DO METALS REACT WITH OXYGEN?
(s)
(g)
Other examples: iron + oxygen→ iron oxide copper + oxygen → copper oxide
Zinc Oxide
Oxygen
(s)
2ZnO
2Zn
Zinc
All the reactions of a METAL+ OXYGEN make an OXIDE
There is a pattern. Metals that react vigorously with dillute acids also react vigorously with oxygen. Metals that do not react with dillute acids do not react with oxygen.
Now do the activities in your Science 8, 122
Magnesium reacts vigorously with dillute acids. It also burns in oxygen. Magnesium is a reactive metal. Gold does not react with dilute acids or with oxygen. It's unreactive.
How do reactions with acids and oxygen compare?