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Year 8 Homework 12/1/22 OALH
By Xenia Bennett
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Last updated over 4 years ago
13 questions
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Question 1
1.
Draw the electron configuration of a sodium atom.
visibility
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Question 2
2.
Question 3
3.
Question 4
4.
Question 5
5.
Question 6
6.
Question 7
7.
Explain how you can tell if an experiment is exothermic or endothermic using a thermometer.
Question 8
8.
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Question 9
9.
Question 10
10.
Question 11
11.
Question 12
12.
Write the word equation for the reaction between Iron and Oxygen
Challenge
Question 13
13.
Complete the symbol equation for the reaction: copper + oxygen ---> copper oxide
In chemical reactions...
Energy is released as atoms are rearranged
Energy is transferred as atoms are rearranged
Energy is created as atoms are rearranged
An exothermic reaction is one that takes energy in from its surroundings.
True
False
An example of uses of exothermic reactions are…
Hand warmers
Sport injury pack
An endothermic reaction is a reaction that takes energy in from its surroundings
True
False
An example of an endothermic reaction is...
Sports injury packs
Hand warmers
What do the symbols (s), (l), (g) and (aq) stand for?
(g)
Solid
(aq)
Liquid
(l)
Gas
(s)
Aqueous
How do we represent chemical reactions?
By writing chemical sums
By adding the chemicals together
By writing word and symbol equations
Where do we write the reactants?
Left
Right
Where do we write the products?
Left
Right