An Internet Sampler on Chemical Bonding for High School Chemistry Students Original work by Christy Johannesson, modified by Georgia Rutschilling INTRODUCTION Much like people, most atoms don't like to live solitary existences. They need to COME TOGETHER with other atoms to lead more stable, happier lives. This process of coming together is called chemical bonding. Through completing the following Internet Activities, you will learn the characteristics of three types of bonding - covalent, ionic, and metallic. Use this worksheet to record your answers to the questions below. KEEP YOUR DESCRIPTIONS SHORT AND SIMPLE. If you need additional help in defining chemistry related terms, use this Chemistry Dictionary. Back to Top INTERNET ACTIVITIES Introduction to Bonding Introduction to Chemical Bonding Since it seems to be blocked, here is the text of that webpage: Section 6-1: Introduction to Chemical Bonding "Atoms seldom exist as independent particles in nature. The oxygen you breathe, the water that makes up most of your body, and nearly all other substances are made up of combinations of atoms that are held together by chemical bonds. A chemical bond is a mutual electrical attraction between the nuclei and valence electrons of different atoms that binds the atoms together. "Why are most atoms chemically bonded to each other? As independent particles, they are at relatively high potential energy. Nature, however, favors arrangements in which potential energy is minimized. This means that most atoms are less stable existing by themselves than when they are combined. By bonding with each other, atoms decrease in potential energy, thereby creating more stable arrangements of matter." Record your answers on the worksheet. 1. What is a chemical bond? 2. Why do most atoms form chemical bonds? Back to Top Ionic Bonding Chemical Bonding Ionic Bonds Ionic Bonding Chemical Bonding 2 Use the Bonding Comparison Chart to summarize your answers. 1. What types of atoms typically form ionic bonds? 2. How are ionic bonds formed and what type of structure do they create? 3. What are the typical properties of ionic substances? Include the following: physical state, melting point, solubility in water, electrical conductivity, and any other properties you'd like to include. 4. Insert an image into the chart that you feel best represents ionic bonding. Resize the image to make it small enough to fit. Back to Top Covalent Bonding Chemical Bonding Molecular Structures - Physical Properties (Note: "molecular" = "covalent") Use the Bonding Comparison Chart to summarize your answers. 1. What types of atoms typically form covalent bonds? 2. How are covalent bonds formed and what type of structure do they create? 3. What are the typical properties of covalent substances? Include the following: physical state, melting point, solubility in water, electrical conductivity, and any other properties you'd like to include. 4. Insert an image into the chart that you feel best represents covalent bonding. Resize the image to make it small enough to fit. Be sure to cite your source. Back to Top Metallic Bonding Chemical Bonding Metallic Bonds Metallic Bonding Use the Bonding Comparison Chart to summarize your answers. 1. What types of atoms typically form metallic bonds? 2. How are metallic bonds formed and what type of structure do they create? 3. What are the typical properties of metallic substances? Include the following: physical state, melting point, solubility in water, electrical conductivity, and any other properties you'd like to include. 4. Insert an image into the chart that you feel best represents metallic bonding. Resize the image to make it small enough to fit. Back to Top CONCLUSION You have had the opportunity to explore the key aspects of ionic, covalent, and metallic bonding. Now, let's put your newfound knowledge to use! 1. Use your Come Together Worksheet to complete the online quiz posted on Edline If your score is lower than 80%, you need to review the topics you missed. STORY - Choose one type of bonding and write “A Day in the Life of an Atom” story describing what it's like to be an atom that forms your chosen bond type. The story should incorporate at least 5 properties from your Bonding Comparison Chart. The following rubric will be used to assess your story Story Writing : Chemical Bonding - Come Together Product CATEGORY Title Title is creative, sparks interest and is related to the story and topic. Title is related to Title is present, but the story and topic. does not appear to be related to the story and topic. No title. Introduction First paragraph has a "grabber" or catchy beginning. First paragraph has a weak "grabber". A catchy beginning was attempted but was confusing rather than catchy. No attempt was made to catch the reader's attention in the first paragraph. Accuracy of Facts All facts presented in the story are accurate. Almost all facts presented in the story are accurate. Most facts presented in the story are accurate (at least 70%). There are several factual errors in the story. Creativity The story contains many creative details and/or descriptions that contribute to the reader\'s enjoyment. The author has really used his imagination. The entire story is related to the assigned topic and allows the reader to understand much more about the topic. The story contains a few creative details and/or descriptions that contribute to the reader\'s enjoyment. The author has used his imagination. The story contains a few creative details and/or descriptions, but they distract from the story. The author has tried to use his imagination. There is little evidence of creativity in the story. The author does not seem to have used much imagination. Most of the story is related to the assigned topic. The story wanders off at one point, but the reader can still learn something about the topic. Almost all (about 90%) the written requirements were met. Some of the story is related to the assigned topic, but a reader does not learn much about the topic. No attempt has been made to relate the story to the assigned topic. Most (about 75%) of the written requirements were met, but several were not. Many requirements were not met. There is 1 grammatical, spelling or punctuation errors. There are 2 to 3 grammatical, spelling or punctuation errors. There are more than 3 grammatical, spelling or punctuation errors. Focus on Assigned Topic Requirements Grammar. Spelling, Punctuation. All of the written requirements (at least 5 properties from Bonding Comparison Chart) were met. There are no grammatical, spelling or punctuation errors. Back to Top Credits: Title Image: logo-1.gif. [Online Image] Available http://www.cometogether1.com, 6/4/02 Bonding Images: ColvanttoIonic.jpg. [Online Image] Available http://www.chemistry.ohio- state.edu/~grandinetti/ teaching/Chem121/lectures/Electronegativity/ENBondPolarity.html, 8/1/02 Background Image: lbg045.gif. [Online Image] Available http://www.bellsnwhistles.com, 6/4/02 Music: cometoge.wav. [Online Sound] Available http://www.kappa.ro/music/paudi.html, 6/5/02 Modern Chemistry Logo: H03MCHEM.JPG. [Online Image] Available http://go.hrw.com, 7/29/02 Copyright 2002. Northside Independent School District. All rights reserved.