Topic 2 - Chemistry
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- Created by: gg1903
- Created on: 22-02-19 16:05
What charge do electrons have?
-1
1 of 50
What charge will an ion of Lithium take?
1+ ( one electron in the outer shell which it needs to lose)
2 of 50
What charge will an ion of Beryllium take?
2+ (two electrons in the outer shell whih need to be lost)
3 of 50
What charge will an ion on Barium take?
2+
4 of 50
What charge will an ion of Flourine take?
1- (7 in th outer shell and needs to gain one)
5 of 50
If something has gained electrons what charge will it have?
Negative
6 of 50
If somethig had lost electrons what charge will it have?
Positve
7 of 50
What charge will an ion of Oxygen take?
2-
8 of 50
What charge will an ion of Selenium take?
2-
9 of 50
Explain in terms of electrons what occur when Lithium bonds with Chlorine?
One electron is transferred from Lithium to Chlorine
10 of 50
Why do atmos transfer electrons in ionic bonding?
So they can have a full outer shell
11 of 50
Explain in terms of elctrons what happens when Magnesium bonds with Oxygen?
Two electrons are transferred from Magnesium to Oxygen
12 of 50
Explain in terms of electrons what happens when Magnesium bonds with Chlorine?
One electron of magnesium is transferred to two different Chlorine atoms
13 of 50
Why do Sodium and Chlorine ions form an ionic bond?
Because there is an electrostatic force of attraction between oppositely charged ions
14 of 50
Why don't Sulphur and Oxygen ions form an ionic bond?
Because they both have negative charges so they would repel against each other
15 of 50
What is the name of the substance made of billions of oppositely charged ions joined togther?
Giant ionic lattice
16 of 50
Define giant ionic lattice?
A huge 3D network of ions
17 of 50
State the melting points of ionic substances?
High
18 of 50
Why do ionic substances have high melting points?
Because of strong bonds between oppositly charged ion are hard to break, a lot of energy is required to break them
19 of 50
Explain why ionic compounds do not conduct electricity when a solid?
Because the ions are not free to move
20 of 50
Explain why ionic compounds conduct electricity when molten or in a solution?
Because ions are free to move
21 of 50
What does soluble mean?
Dissolves in water
22 of 50
What does insoluable mean?
Does not dissolve in water
23 of 50
Magnesium Carbonate is in soluable, what do you need to do before it will conduct electricity?
Melt it
24 of 50
Will NaCl (s) conduct electricity?
No
25 of 50
Will NaCl (aq) conduct electricty
Yes as (aq) stand for aqueous which means dissolved in water
26 of 50
Sodium floride is soluable. Explain what the easiest way for it to condcut electricty is?
Dissolve it in water because this does not require high temperatures
27 of 50
Explain why Chlorine and Flourine form covalent bonds?
They are both non-metals
28 of 50
In covalent bonds, electrons are?
Shared
29 of 50
In ionic bonds, electrons are?
Transferred
30 of 50
What type of substances are Methane and Water
Simple molecular (or simple molecule)
31 of 50
What is a molecule?
A group of atoms chemically bonded togther
32 of 50
Describe the structure of simple covalent molecules?
Strong covalent bonds between atoms, weak forces holding the molecule togther
33 of 50
What are intermolecular forces?
Weak forces between molecules which hold them togther
34 of 50
Explain why Methane has a low melting point?
It is a simple molecular substance with weak forces between the molecules (which are easy to break)
35 of 50
What is a Polymer?
Millions of small molecules joined togther in a chain to form a large molecule
36 of 50
What is the name given to the structure of Diamond, Graphite and Silicon Dioxide?
Giant covalent
37 of 50
How many bonds does each Carbon atom have in a Diamond?
4
38 of 50
Explain why Diamond has a high melting point?
Giant structure, strong covalent bonds between atoms, requires a lot of energy to break
39 of 50
Explain why most giant covalent structures do not conduct electricity? (3 marks)
There are no electrons/ions/charged particles that are free to move
40 of 50
Explain why Graphite conducts electricty?
It has delocalised electrons between layers that can move through the graphite
41 of 50
Explain why Graphite can act as a lubricant?
Weak forces between layers which are free to slide over each other
42 of 50
Describe the main features of metals in terms of their structure?
Positive metal ions arranged in layers with delocalised electrons
43 of 50
Explain why metals can conduct electricity?
Because they have delocalised electrons that are free to carry a charge
44 of 50
Explain why pure metals are soft?
Layers of metal ions are free to slide over each other
45 of 50
What is an alloy?
A mixture of two or more elements, at least one of which is a metal
46 of 50
Give a reason for alloying a metal?
To make it harder, to make it less reactive
47 of 50
Explain why alloys can be harder than pure metals?
Different size of atoms disturb the layers to stop them sliding over each other
48 of 50
What is Graphene?
One layer of Graphite
49 of 50
What is Fullerene?
Substance made of Carbon atoms arranged in a cage
50 of 50
Other cards in this set
Card 2
Front
What charge will an ion of Lithium take?
Back
1+ ( one electron in the outer shell which it needs to lose)
Card 3
Front
What charge will an ion of Beryllium take?
Back
Card 4
Front
What charge will an ion on Barium take?
Back
Card 5
Front
What charge will an ion of Flourine take?
Back
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