Zusammenfassung der Ressource
Chemical Bonds
- Metalic
- Metals
- Sea of Delocallised electrons
- Flow of electrons ==> Electricity
- Regular layered structure
- Malleable
- Covalent
- Non-metals
- Sharing of Electrons
- Strong
- Giant Covalent
- Silicon Dioxide
Anmerkungen:
- http://en.wikipedia.org/wiki/Silicon_dioxide
- http://www.google.co.uk/imgres?safe=active&hl=en&gbv=2&biw=1366&bih=681&tbm=isch&tbnid=g4loXObprsmi9M:&imgrefurl=http://www.tradeget.com/listing/hitop-optical-vapor-material-co-ltd/products-services/58201/1/&docid=GBWG-u2g_4GNzM&imgurl=http://img1.tradeget.com/hitopoptinal%25255C7EV31VTV1sio2.jpg&w=320&h=320&ei=7EKjUc76LoTE0QWz_IHIAg&zoom=1&ved=1t:3588,r:9,s:0,i:108&iact=rc&dur=2358&page=1&tbnh=182&tbnw=180&start=0&ndsp=18&tx=80&ty=64
- http://www.google.co.uk/imgres?safe=active&hl=en&gbv=2&biw=1366&bih=681&tbm=isch&tbnid=_4sA_n1KcsPx_M:&imgrefurl=http://www.edulabworld.com/product/265-sio2-crystal-model-31046-1-d1a7/&docid=mE7WbAKGOx52uM&imgurl=http://www.edulabworld.com/imglibs/images/265-1217231814850-middle.jpg&w=360&h=326&ei=7EKjUc76LoTE0QWz_IHIAg&zoom=1&ved=1t:3588,r:40,s:0,i:208&iact=rc&dur=1195&page=2&tbnh=178&tbnw=192&start=18&ndsp=24&tx=6&ty=126
- aka. Mica
- aka. sand/quartz
- Melting point: 1,600 °C
Boiling point: 2,230 °C
- High mp and bp
- To melt/boil one must break covalent bonds
- Covalent bonds are strong
- Breaking requires a lot of energy
- Therefore hard to break
- Carbon
- Diamond
- Graphite
Anmerkungen:
- http://en.wikipedia.org/wiki/Graphite
- layered
- can slide
- pencils
- Simple Molecular
Anmerkungen:
- http://www.google.co.uk/imgres?safe=active&sa=G&hl=en&biw=1366&bih=643&gbv=2&tbm=isch&tbnid=1ZDIA5r84GpmBM:&imgrefurl=http://ddrmacintosh.tripod.com/grade11chemistryunit1matterandchemicalbonding/id1.html&docid=b6ktck_BniySNM&imgurl=http://ddrmacintosh.tripod.com/sitebuildercontent/sitebuilderpictures/compounds_molecules.jpg&w=582&h=340&ei=9TyjUe7ZCPLZ0QWru4HwCQ&zoom=1&ved=1t:3588,r:16,s:0,i:132&iact=rc&dur=2292&page=1&tbnh=171&tbnw=281&start=0&ndsp=19&tx=77&ty=63
- weak intermolecular forces
- easy to overcome
- requirement for boiling
- and melting but not as much
- between molecules
- molecules madeof atoms
joined by covalent bonds
- normally liquids (e.g. water) or gases (e.g. Hydrogen, Oxygen)
- A covalent bond is made up of a strong
attraction between the bonding pairs of electrons
and the nuclei of the atoms involved in the bond
- Ionic
Anmerkungen:
- http://www.marin.edu/homepages/ErikDunmire/CHEM105/Concept_Review/Ionic/Ionic_Cmpds.html
- Metal + Non-metal
- involves ions
- Positive ions and negative ions
- Electrostatic forces
pull them together
- need to break to become liquid or gas
- difficult
- normally solid at rt.
- regular structure
- giant ionic
- when molten or aq. electrolysis can occur
- Flow of charge==> Electricity
- e.g. NaCl
Anmerkungen:
- http://www.google.co.uk/imgres?safe=active&sa=G&hl=en&biw=1366&bih=643&gbv=2&tbm=isch&tbnid=cigOcCaxNKZvTM:&imgrefurl=http://itc.gsw.edu/faculty/speavy/spclass/chemistry/bonds.htm&docid=M9AszkSeMGxq7M&imgurl=http://itc.gsw.edu/faculty/speavy/spclass/chemistry/bonds1.gif&w=907&h=447&ei=9TyjUe7ZCPLZ0QWru4HwCQ&zoom=1&ved=1t:3588,r:10,s:0,i:114&iact=rc&dur=802&page=1&tbnh=157&tbnw=320&start=0&ndsp=19&tx=129&ty=64
- http://www.google.co.uk/imgres?safe=active&sa=G&hl=en&biw=1366&bih=643&gbv=2&tbm=isch&tbnid=7fybeNsbpLMILM:&imgrefurl=http://www.elmhurst.edu/~chm/vchembook/143Aioniccpds.html&docid=u76eGn_BrUL2JM&imgurl=http://www.elmhurst.edu/~chm/vchembook/images/151ionic.GIF&w=340&h=383&ei=9TyjUe7ZCPLZ0QWru4HwCQ&zoom=1&ved=1t:3588,r:2,s:0,i:90&iact=rc&dur=3395&page=1&tbnh=193&tbnw=166&start=0&ndsp=19&tx=116&ty=84
- http://www.google.co.uk/imgres?safe=active&sa=G&hl=en&biw=1366&bih=643&gbv=2&tbm=isch&tbnid=KfYunnzAF2ttwM:&imgrefurl=http://chemistry.tutorvista.com/physical-chemistry/ionic-bonding.html&docid=voI5A-lax66odM&imgurl=http://image.tutorvista.com/cms/images/44/ionic-compound-structure.JPG&w=222&h=217&ei=9TyjUe7ZCPLZ0QWru4HwCQ&zoom=1&ved=1t:3588,r:9,s:0,i:111&iact=rc&dur=1244&page=1&tbnh=133&tbnw=112&start=0&ndsp=19&tx=74&ty=98
- Hold elements and compounds together