Topic 2. IonicSimple (covalent) Giant (covalent) Metallic Melting point Boiling point Electrical/...
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Transcript of Topic 2. IonicSimple (covalent) Giant (covalent) Metallic Melting point Boiling point Electrical/...
![Page 1: Topic 2. IonicSimple (covalent) Giant (covalent) Metallic Melting point Boiling point Electrical/ heat conductor Yes, when molten or in solution.](https://reader035.fdocuments.us/reader035/viewer/2022062801/56649e7b5503460f94b7cde3/html5/thumbnails/1.jpg)
Topic 2
All you need to know about Additional Science
![Page 2: Topic 2. IonicSimple (covalent) Giant (covalent) Metallic Melting point Boiling point Electrical/ heat conductor Yes, when molten or in solution.](https://reader035.fdocuments.us/reader035/viewer/2022062801/56649e7b5503460f94b7cde3/html5/thumbnails/2.jpg)
2.1 – 2.4 PropertiesIonic Simple
(covalent)Giant
(covalent)Metallic
Melting point
Boiling point
Electrical/heat conductor
Yes, whenmolten or insolution (aq)as allowsions to move
No, due to no overall charge
No – diamondYes – graphite due to delocalisedelectrons
Yes, due to delocalised electrons
Str
ong
ele
ctro
stati
c fo
rces
Str
ong
covale
nt
bonds,
weak
inte
rmole
cula
r fo
rces
Str
ong
covale
nt
bonds
![Page 3: Topic 2. IonicSimple (covalent) Giant (covalent) Metallic Melting point Boiling point Electrical/ heat conductor Yes, when molten or in solution.](https://reader035.fdocuments.us/reader035/viewer/2022062801/56649e7b5503460f94b7cde3/html5/thumbnails/3.jpg)
2.3 Graphite
Layers of graphite slip off and leave a mark on paper
The free e- from each C atom can move in between the layers, making graphite a good conductor of electricity
![Page 4: Topic 2. IonicSimple (covalent) Giant (covalent) Metallic Melting point Boiling point Electrical/ heat conductor Yes, when molten or in solution.](https://reader035.fdocuments.us/reader035/viewer/2022062801/56649e7b5503460f94b7cde3/html5/thumbnails/4.jpg)
2.4 Metal
•Pure metals are made up of layers of one type of atoms
•These slide easily over one another and therefore metals can be bent and shaped
![Page 5: Topic 2. IonicSimple (covalent) Giant (covalent) Metallic Melting point Boiling point Electrical/ heat conductor Yes, when molten or in solution.](https://reader035.fdocuments.us/reader035/viewer/2022062801/56649e7b5503460f94b7cde3/html5/thumbnails/5.jpg)
2.5 Nanoscience
• Structures are: 1-100 nm in size or
a few hundred atoms
• Show different properties to same materials in bulk
• Have high surface area to volume ratio
![Page 6: Topic 2. IonicSimple (covalent) Giant (covalent) Metallic Melting point Boiling point Electrical/ heat conductor Yes, when molten or in solution.](https://reader035.fdocuments.us/reader035/viewer/2022062801/56649e7b5503460f94b7cde3/html5/thumbnails/6.jpg)
2.5 Nanoscience
• Titanium oxide on windowsTitanium oxide reacts with sunshine, which breaks down dirt
• Silver and socksSilver nanoparticles in socks can prevent the fabric from smelling