Post on 16-Apr-2017
transcript
Matters at atomic levelTran Anh Tuan
Materials EngineerMES Team
05/03/23 http://www.meslab.org 2
Lecture map
atomic arrangement in matters
atomic bonding
atomic structure
covalentionicmetallicVan der Waals Gase
sCrystalsAmorphousLiquids
05/03/23 http://www.meslab.org 3
Atomic structure
05/03/23 http://www.meslab.org 4
Atom = proton + neutron + electron
05/03/23 http://www.meslab.org 5
Atom = proton + neutron + electron
- charge: + 1.6e-19 eV- heavy weight
- charge: 0 ( no charge)- heavy weight (~proton)
- charge: - 1.6e-19 eV- light weight
no charge
05/03/23 http://www.meslab.org 6
Atom = proton + neutron + electron
- charge: + 1.6e-19 eV- heavy weight
- charge: 0 ( no charge)- heavy weight (~proton)
- charge: - 1.6e-19 eV- light weight
nucleous core
electronic shell
~ atom weight
no charge
05/03/23 http://www.meslab.org 7
atomic arrangement in matters
atomic bonding
atomic structure
covalentionicmetallicVan der Waals Gase
sCrystalsAmorphousLiquids
Lecture map
05/03/23 http://www.meslab.org 8
Atomic bonding
05/03/23 http://www.meslab.org 9
Covalent bonding
05/03/23 http://www.meslab.org 10
Cl
Cl
Covalent bonding
05/03/23 http://www.meslab.org 11
Cl
Cl
Individual Cl atoms with 7
outer electrons
Covalent bonding
Chemically Unstable
05/03/23 http://www.meslab.org 12
bondingCl
Cl
Cl
Cl
Individual Cl atoms with 7
outer electrons
Covalent bonding
Chemically Unstable
05/03/23 http://www.meslab.org 13
bondingCl
Cl
Cl
Cl
Individual Cl atoms with 7
outer electrons
One Cl2 molecular with
8 outer electrons
Covalent bonding
Chemically Unstable
Chemically Stable
05/03/23 http://www.meslab.org 14
Ionic bondingLi F
05/03/23 http://www.meslab.org 15
Ionic bondingLi F
Individual Li and F atoms with 1
and 7 outer electrons
Chemically Unstable
05/03/23 http://www.meslab.org 16
Ionic bondingLi F
Individual Li and F atoms with 1
and 7 outer electrons
Chemically Unstable
05/03/23 http://www.meslab.org 17
Ionic bondingLi F
bondingLi
F
Individual Li and F atoms with 1
and 7 outer electrons
One LiF molecular with
8 outer electrons
Chemically Unstable
Chemically Stable
05/03/23 http://www.meslab.org 18
Metallic bonding metallic
ionfree electron
Balanced Coulombic Stochastic Interaction.Metallic materials
05/03/23 http://www.meslab.org 19
Van der Waals bonding positively
chargednegatively charged
Usually seen in polymeric materials
+ - + - + - +
-Polarized molecular
05/03/23 http://www.meslab.org 20
atomic arrangement in matters
atomic bonding
atomic structure
covalentionicmetallicVan der Waals Gase
sCrystalsAmorphousLiquids
Lecture map
05/03/23 http://www.meslab.org 21
Atomic arrangement
05/03/23 http://www.meslab.org 22
Gaseous matters
2D illustration of atomic arrangement in gaseous matters
05/03/23 http://www.meslab.org 23
Gaseous mattersabsolutely
chaotic
2D illustration of atomic arrangement in gaseous matters
05/03/23 http://www.meslab.org 24
Gaseous mattersabsolutely
chaotic
2D illustration of atomic arrangement in gaseous matters
no near - ordered
05/03/23 http://www.meslab.org 25
Gaseous mattersabsolutely
chaotic
2D illustration of atomic arrangement in gaseous matters
no near - orderedno far - ordered
05/03/23 http://www.meslab.org 26
Solid crystals
2D illustration of atomic arrangement
in solid crystals
05/03/23 http://www.meslab.org 27
Solid crystalsabsolutely ordered
2D illustration of atomic arrangement
in solid crystals
05/03/23 http://www.meslab.org 28
Solid crystalsabsolutely orderednear - ordered
2D illustration of atomic arrangement
in solid crystals
05/03/23 http://www.meslab.org 29
Solid crystalsabsolutely orderednear - orderedfar - ordered
2D illustration of atomic arrangement
in solid crystals
05/03/23 http://www.meslab.org 30
Liquid and amorphous
2D illustration of atomic arrangement
in liquids and amorphous
05/03/23 http://www.meslab.org 31
Liquid and amorphousPartly,
unstably ordered
2D illustration of atomic arrangement
in liquids and amorphous
05/03/23 http://www.meslab.org 32
Liquid and amorphousPartly,
unstably orderednear - ordered
2D illustration of atomic arrangement
in liquids and amorphous
05/03/23 http://www.meslab.org 33
Liquid and amorphousPartly,
unstably orderednear - orderedno far - ordered
2D illustration of atomic arrangement
in liquids and amorphous
05/03/23 http://www.meslab.org 34
End of Lecture 01Next:
Lecture 02: Crystal lattice