ADV. BIOLOGY

Understanding Covalent Bonding (a short PowerPoint)  (Click on Link to open PowerPoint)

To review bonds, consider the follow analogy. Click on the links for images that correspond to this analogy. Two men each have a dollar bill (representing an electron in atoms) and wish to pool their resources and share the money. There are three ways for them to share the money. Each can pool their dollars and have equal access to their shared $2. This is analogous to a nonpolar covalent bond. In this case each person has contributed $1 but shares $2. Alternatively, one person can take most of the $2, giving that person a slight positive excess (d+) over the money he initially contributed and the other a slight negative lack (d-) over the money he contributed. This is analogous to a polar covalent bond. Finally one person can take the other persons $1. He will now have a full 1+ excess of dollars, and the other person a full 1- lack of dollars.

How does this help you in understanding bonding and could you know explain bonding (Ionic and Covalent) to someone??

This will assist you in preparing your background information for the water lab.

A covalent bond is an inter atomic linkage between two atoms. The bonded atoms have a lower total energy than that found in widely separated atoms. The sharing of a pair of electrons creates a force of attraction between the atomic centers (positively charged) and the same two electrons.

Covalent bonds are directional. Atoms are bonded together in preferred orientations relative to one another. Molecules, therefore, have definite shapes such as that seen in the bent structure of a water molecule.

Interactive Covalent Bonds:  (click on link) This will assist you, as well as, provide use with real time visual learning of the types of bonding that various atoms undergo to form molecules and/or compounds.

For those of you who need some more help in understanding the differences between Ionic bonds; Covalent Bonds (Polar and Non-Polar Bonds) go to this interactive site: Compare Bonds

Balancing act…remember “conservation of mass” one is done to one side of the equation must be done to the other side of the equation. RAGS TO RICHES GAME (click on this link)

Only you can safe this man from hanging!!!!!!! How well do you know your Chemistry??????  CLICK LINK TO GO TO “HANGMAN GAME”

Chemistry Jeopardy/Challenge Board http://www.quia.com/cb/5970.html

“RAGS TO RICHES” CAN YOU BECOME A MILLIONAIRE?

http://www.quia.com/rr/172231.html

Can you match the the vocabulary word to the proper definition? 

http://www.quia.com/mc/39778.html

Try this out practice your skills in mixtures on this kool computer based lab:

http://www.harcourtschool.com/activity/mixture/mixture.html