NEW
Font size
WorksheetsCCC Week 3, 10X Chemistry
Total questions: 25
Worksheet time: 50mins
In ionic bonds, electrons are...
Shared
Transferred
Destroyed
Created
What charge do electrons have?
-1
+1
0
-2
What charge will an ion of lithium take?
2+
1+
0
1-
2-
What charge will an ion of beryllium take?
2+
1+
0
1-
2-
If something has gained electrons, what charge will it have?
Negative
Postive
Neutral
If something has lost electrons, what charge will it have?
Negative
Positive
Neutral
What charge will an ion of Selenium take?
2+
1+
0
1-
2-
Define giant ionic lattice
A huge 3D network of ions
A huge ball of ionic molecules
A 2D chain of ions
A large molecule
What is the name for a substance made of billions of oppositely charged ions joined together?
Giant ionic lattic
Giant covalent lattice
Polymer
Molecule
Explain why ionic compounds do not conduct electricity when solid
Because the ions are not free to move
Because they do not contain charged particles
Because they can only conduct electricity when very cold
Because they require magnetic charge to conduct electricity
Explain why ionic compounds conduct electricity in solution
Because the ions are free to move
Because they become a metal
Because they become superconducting
Because all liquids conduct electricity
What does soluble mean?
Dissolves in water
Can become an emulsion
Solid at room temperature
It is a salt
What does insoluble mean?
Does not dissolve in water
Does dissolve in water
Does not dissolve in oil
Does dissolve in oil
Has two solu atoms
Magnesium carbonate is insoluble. What do you need to do before it will conduct electricity?
Melt it
Burn it
Crush it
Freeze it
Sodium fluoride is soluble. Explain what the EASIEST way for it to conduct electricity is
Dissolve it in water because this does not require high temperatures.
Melt it because this requires high temperatures.
Crush it because this does not require high temperatures.
Explain why chlorine and fluorine form covalent bonds.
They are both non-metals.
They are both metals.
They are both ions.
They are both atoms.
What is the name given to the structure of diamond, graphite and silicon dioxide?
Giant covalent
Giant ionic
Covalent molecules
Polymers
How many bonds does each carbon have in diamond?
4
6
3
1
Explain why diamond has a high melting point.
The strong covalent bonds require a lot of energy to break.
The strong ionic bonds require a lot of energy to break,
The polymer chain requires a lot of energy to break
The molecules require a lot of energy to break.
Explain why most giant covalent substances do not conduct electricity.
There are no charged particles which are free to move.
They are too cold to conduct electricity.
The neutrons in the structure do not allow electricity conduction.
They are too solid to conduct electricity.
Explain why graphite conducts electricity.
It has delocalised electrons between the layers that can move.
It is a solid with electrons.
The protons in the structure allow electricity flow.
It is a liquid, so allows movement.
Why can graphite act as a lubricant?
Weak forces allow the layers to slide over one another.
It is a liquid so allows things to slide easily.
Strong forces allow it the wraps around things.
As a non-metal it allows things to move more easily.
What is graphene?
One layer of graphite
A ball of graphite
Three layers of methane
A cube of lithium
What is a fullerene?
Substance made of carbon atoms arranged in a cage
Substance made of oxygen atoms arranged in a ball
Substance made of lithium atoms arranged in a cage
Substance made of helium atoms arranged in a ball
What type of substance are methane and water?
Simple molecular
Complex atomic
Simple atomic
Complex molecular
