Download
chapter 2 molecules ions and compounds n.
Skip this Video
Loading SlideShow in 5 Seconds..
Chapter 2: Molecules, Ions, and Compounds PowerPoint Presentation
Download Presentation
Chapter 2: Molecules, Ions, and Compounds

Chapter 2: Molecules, Ions, and Compounds

118 Vues Download Presentation
Télécharger la présentation

Chapter 2: Molecules, Ions, and Compounds

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Chapter 2: Molecules, Ions, and Compounds MACROSCOPIC SCALE Elements combine to make compounds. ATOMIC SCALE Atoms combine to make molecules, or extended structures.

  2. What we’ll cover… • Compound Formulas • Ions • Monatomic • Polyatomic • Ionic Compounds • Molecular Compounds • Other types of extended Structures

  3. Compound Formulas Examples: NaCl CH3OH (NH4)2SO4

  4. How many O atoms are in Mg3(PO4)2? • 2 • 4 • 6 • 8

  5. How many total atoms are in Mg3(PO4)2? • 3 • 10 • 11 • 13

  6. Three Types of Compounds Molecular Covalent Extended Covalent Ionic Alloys

  7. Can you predict this? Ionic Compounds form from: Molecular Compounds form from:

  8. Types of Formulas

  9. IONS Cations Formed by losing electrons. Have a positive charge. Formed mainly from metals.

  10. IONS Anions Formed by gaining electrons. Have a negative charge. Formed mainly from nonmetals. Cations Formed by losing electrons. Have a positive charge. Formed mainly from metals.

  11. Monatomic Ions- Formed from single atoms

  12. Books closed: What is the charge on a Mg ion? • +1 • +2 • +3 • -1 • -2 • -3

  13. Naming IONS Cations Name of element + “ion” Na+ = sodium ion Mg2+ = magnesium ion

  14. Naming IONS Anions Name of element with –ide ending + “ion” Cl- = chloride ion O2- = oxide ion Cations Name of element + “ion” Na+ = sodium ion Mg2+ = magnesium ion

  15. Polyatomic Ions you need to know

  16. Ionic Compound Formulas Total cation charge = Total anion charge Ex: Na+ and Cl- make ________

  17. Ionic Compound Formulas Total cation charge = Total anion charge Ex: Na+ and Cl- make NaCl Mg2+ and Cl- make ________

  18. Ionic Compound Formulas Total cation charge = Total anion charge Ex: Na+ and Cl- make NaCl Mg2+ and Cl- make MgCl2 NH4+ and SO42- make _________

  19. What is the formula of the compound formed between Fe3+ and Cl-? • FeCl • FeCl3 • Fe3Cl

  20. What is the formula of the compound formed between Fe3+ and SO42-? • FeSO4 • Fe(SO4)2 • Fe2(SO4)3 • Fe3(SO4)2

  21. Naming Ionic Compounds Name = cation name + anion name Ex: NaCl = NH4Br =

  22. Molecular Compounds Nonmetal + nonmetal gives molecular compound Ex: C + O S + O C + H

  23. Aside on gas prices… Propane Butane Jet Fuel Gasoline Diesel/Heating Longer molecules(asphalt/tar) Crude oil

  24. Predicting Molecular Compound Formulas

  25. Naming Molecular Compounds Binary Compounds form between 2 elements

  26. Naming Molecular Compounds Binary Compounds form with 2 elements Element with highest group # named last, like it’s an anion.

  27. Naming Molecular Compounds Binary Compounds form with 2 elements Element with highest group # named last, like it’s an anion. Use prefixes to indicate numbers: 2 = di 3 = tri 4 = tetra 5 = penta

  28. Network Solids • Held together like a molecule • Large and extended