1 / 14

Ionic and Metallic Bonding

Ionic and Metallic Bonding. Chapter 7. Valence Electrons. The ________________in an atom Their arrangement determines the bonding prosperities and activities of an atom S-Block– they are the same as the group number Na= 1 valence electron

darrin
Download Presentation

Ionic and Metallic Bonding

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ionic and Metallic Bonding Chapter 7

  2. Valence Electrons • The ________________in an atom • Their arrangement determines the bonding prosperities and activities of an atom • S-Block– they are the same as the group number Na= 1 valence electron • P-Block– They are ____________ ______________________ C= 4 valence electrons F= 7 valence electrons Iodine… 7 valence electrons

  3. Electron Dot Notation: Instead of drawing the orbital diagram, which can be long & complex, there is an easier way to represent the atoms. Electron Dot Notation: is an electron notation in which ____________________________ __________________, and are represented by dots around the element’s symbol. Lots and lots of examples… Valence electrons Dot notation

  4. Ions Ion: atom that has lost or gained an electron Cation: atom that has a +ve charge (A+). i.e. missing an e- Anion: atom that has a –ve charge (X-). i.e. has an extra e- Do the Lewis structure for Cl, Cl-, Na, Na+

  5. Polyatomic Ions • Polyatomic ions are _______________________________ _____________________________________________. • Common Examples… • OH- (Hydroxide) • NO3- (Nitrate) • SO42- (Sulfate) • PO43- (Phosphate) (draw their Lewis structures) • There are more that you will need to memorize over thanksgiving break… maybe you should start now, lets look at them…

  6. Ionic Bonding Most of Earth’s rocks & minerals are made up of compounds held together by ionic bonds. Ionic Compound:______________________ __________________________________ _________________________________ e.g. Na -> Na+ + e-&Cl + e- -> Cl- Na++Cl-->NaCl(#+’s = #-’s) e.g.2. Mg & Cl(show on board)

  7. Most ionic compounds exist as a 3-D crystalline solid of alternating +’ve & -’ve ions (NaCldia) (Screen 3.9 Coulomb’s law, 3.10 NaCl, 3.10.SB KBr)

  8. Ionic Compounds: atomic arrangement Formula Unit: is the ________________of atoms from which an ionic compounds formula can be established. Ionic compounds can be represented by Electron Dot diagrams. e.g. NaCl

  9. Ionic Solid Structure • Ionic crystals combine in an ________________ ___________________________. • Crystalline solids at room temperature Rutile (crystal and model of lattice)

  10. Ionic Solids: Characteristics -___ melting/boiling pts -very ___________ -when molten (or dissolved in H2O) they become _____ ____________________________

  11. Metallic Bonding: • Metals have few valence e-’s (1,2or3) which roam freely as a “sea of electrons” throughout the metal. ____________________________ ________________. • The atoms themselves are arranged in a crystal like lattice. • The bonding between the metal atoms & this sea of electrons is called ______________. • ____________________________________________________.

  12. Metal Solids Characteristics: • _____________________________ • Luster • __________ • Ductile Metals can only come together when they are in their _____________. _______________________ _____________________________________

  13. Alloys Substitutional Alloy: ______________ _____________________________________________________________________. E.g’s: Brass: Copper (~2/3) & Zinc (~1/3) Bronze: Copper (~80%) & Tin (~20%) Sterling Silver: Silver (93%) & Copper (7%) 24 Karat Gold: Gold (100%) 18 Karat Gold: Gold (18/24 = 75%) & Silver

  14. Interstitial Alloy: some of the holes (interstices) between the metal atoms are ________________. Makes the metal ___________ ______________________ ____________________ Ie. _______:Iron & Carbon (small %)

More Related