1 / 14

Compounds

Compounds. Ionic Compounds. made by combination of metal and nonmetal metal loses electrons – forms cation nonmetal gains electrons – forms anion consider Na and S Na + and S 2- ions formed pack together to make compound Na 2 S. Ionic Compounds. can contain polyatomic ions

wylie-benson
Download Presentation

Compounds

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. Compounds

  2. Ionic Compounds • made by combination of metal and nonmetal • metal loses electrons – forms cation • nonmetal gains electrons – forms anion • consider Na and S • Na+ and S2- ions formed • pack together to make compound Na2S

  3. Ionic Compounds • can contain polyatomic ions • like (NH4)+ • consider (NH4) + and S2- ions formed • pack together to make compound (NH4)2 S +

  4. NaCl Crystal Lattice

  5. Properties of Ionic Compounds • high melting point • hard but brittle • cleave with flat edges • when dissolve in water, dissolves as ions • Conductors when melted or dissolved in water

  6. Covalent (Molecular) Compounds • made by combination of nonmetals only • made by “sharing” electrons • make molecules…fundamental particle of compound

  7. Example of a Molecule - Water

  8. If have water, have water molecules

  9. are electrons shared equally? Pure and Polar Covalent Bonds H – H and F - F pure covalent bond H - Cl polar covalent bond

  10. Electronegativity: A Measure of Polarity

  11. Electronegativity and Bonds • Using electronegativities, arrange the following bonds in order of increasing polarity and identify the shift of the electrons: C – N, O – H, and H – Cl.

  12. Electronegativity and Bonds • Without using the numbers in the electronegativity scale, determine which would be more ionic LiF or BF3?

More Related