The smallest particle of a chemical element that can exist.

What is the best definition of a mixture?

Elements and/or compounds that are not chemically bonded

What is the definition of a compound?

Made up of atoms of different elements chemically bonded

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Atoms, Elements, Compounds and Mixtures

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Quiz to revise year 8 topic introducing these concepts

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Questions 21

Answers

1
Which of the following IS a balanced equation?
Mg + Cl2 -> MgCl2
Na + Cl2 -> 2NaCl
Mg + Cl -> MgCl2
2Na + 2Cl -> NaCl
2
What are the elements in Methanol (CH₃OH)?
Carbon, Oxygen and Hydrogen
Carbon and Hydrogen
Carbon and Oxygen
Carbon, Oxygen, Hydrogen and Nitrogen
3
What is the chemical symbol for Oxygen
Og
O2
O
Ox
4
What is the chemical symbol for carbon?
Co
C
Cr
Ca
5
What are the elements in Fe(NO₃)₃?
Iron and nitrate
Iron, nitrogen and oxygen
Iron and nitrogen
Nitrogen and oxygen
6
What is an atom?
Any type of element
Made up of molecules
The smallest particle of a chemical element that can exist.
The largest particle of a chemical element that can exist.
7
It is difficult to get elements back from compounds, how is this possible?
Evaporation
Pull them apart with your hands
Through chemical reactions
Filtration
8
What is the best definition of a mixture?
Elements and/or compounds that are not chemically bonded
Atoms that are not chemically bonded together
Compounds that are not chemically bonded together
Elements that are not chemically bonded together
9
What does the suffix -ate mean in a compound?
It contains sulphur
It contains more than 1 element
It contains oxygen
It is tasty
10
How many atoms are in the following compound: Ca(OH)₂
5
2
3
4
11
What is the product of this reaction: Magnesium + oxygen ->
Magoxide
Magnesium oxide
Magnesium oxate
Magnesium oxygen
12
If I boiled salt water, what would be left?
Water and salt
Nothing
Water only
Salt only
13
What is the chemical formula of carbon dioxide
CO2
Co2
CO
CrO2
14
How many atoms are in the following compound: CO₂
3
2
1
4
15
What elements make Copper sulphide?
All the elements
Copper, sulphur and oxygen
Copper and sulphur
Copper and sulphide
16
What does the Periodic Table contain?
Compounds
Elements
Atoms
Mixtures
17
Which of the following chemical symbols is correct for Nickel?
n
ni
Ni
NI
18
What is the definition of a compound?
Made up of the same types of atoms chemically bonded
Made up of atoms of different elements chemically bonded
Made up of different types of atoms
Made up of the same types of atoms
19
How can you separate salt from water?
Filtration
Chemical reaction
You can't
Evaporation
20
How can you separate an insoluble particle from a liquid?
Evaporation
You can't
Chemical reaction
Filtration
21
What does the word property mean in chemistry?
Where a substance lives
What a substance looks like
How a substance behaves
If a substance is soluble

Atoms, Elements, Compounds and Mixtures Flashcards | StudBud