1 / 7

Chapter 2

Chapter 2. EXPLAIN Objective: Explain the role of atoms in creating 3 bonds- Hydrogen , Covalent , and Ionic. Chapter 2. A. Chemical Elements and compounds B. Elements for life. Elements cannot be broken down. Compounds consist of two or more elements in a fixed ratio.

karenhunter
Download Presentation

Chapter 2

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. Chapter 2 • EXPLAIN • Objective: Explain the role of atoms in creating 3 bonds-Hydrogen,Covalent, and Ionic.

  2. Chapter 2 A. Chemical Elements and compounds B. Elements for life Elements cannot be broken down. Compounds consist of two or more elements in a fixed ratio. There are 25 out of 92 elements that are essential to life. Most important are O>C>H>N>Ca>P>K

  3. Chapter 2 C. Trace elements Elements required only in small amounts. (Fe,I,B,Se,Si,Zn) When they are missing in our diets, all organisms have side effects or death.

  4. Chapter 2 F. Isotopes EXPLAIN All atoms have the same # of protons, and # of electrons. Whenneutrons # vary you have an isotope. These decaying isotopes are useful for research, but they can also damage cells.

  5. Chapter 2 H. Chemical Bonds Review-Know Behavior. Covalent bonds share valence electrons-H2, O2 Non-polar-lipids-sharing is also equal-long carbon chains

  6. Chapter 2 • Chemical Bonds • Review-Know Behavior. • http://www.youtube.com/watch?v=GRDmlldPtc0 Ionic Bonds- When opposite bonds combine- cation + anion-(NaCl) Cation, missing electron (pos.Charge) Anion extra electrons (neg. charge) A hydrogen bond occurs when a hydrogen covalently bonds to and electronegative atom. Most common

  7. Chapter 2 Molecular shapes Chemical Equilibrium EXPLAIN Compounds having different geometric shapes are allowed to enter different semi-permeable membranes. Knowing their shapes, allows us to mimic the shape with similar chemicals to help medically. Reactant and products work together until they are balanced

More Related