1. Chalk Laura Emory Hr. 7 Chemical Name Chemical Name-Calcium Carbonate Common Name Common Name-limestone, chalk, marble Synonyms Synonyms- calcite, aragonite, carbonic acid calcium salt, limestone Chemical Formula- Chemical Formula- CaCO3 Formula Weight- Formula Weight- molecular weight: 100.09 *Common uses- writing, drawing, used by gymnasts to create friction between the hands/feet and the apparatus they’re using, on pool cues *chalk was formed into sticks for the convenience of artists

2. Chalk Physical Properties Physical Properties-fine, white powder, odorless How its made- How its made- from the skeletons of ancient sea creatures Is it found in nature or man made?- found in nature What it reacts with- What it reacts with-dilute hydrochloric acid Toxic? poisonous? radioactive?- Toxic? poisonous? radioactive?- Non-Toxic Video of chalk reacting with acid: http://www.youtube.com/watch?v=cig6TjOvTj0&feature=related http://www.youtube.com/watch?v=cig6TjOvTj0&feature=related Cost- Cost- 1 lb. gym chalk is about 12$ Type of chemical bond- Type of chemical bond- ionic bond Other interesting information- Other interesting information-when chalk is heated to 825C it gives off calcium oxide fumes and liberates carbon dioxide

3. Chalk  http://www.wisegeek.com/what-is-calcium-carbonate.htm http://www.wisegeek.com/what-is-calcium-carbonate.htm  http://www.ima-na.org/calcium-carbonate http://www.ima-na.org/calcium-carbonate  http://www.jtbaker.com/msds/englishhtml/c0330.htm http://www.jtbaker.com/msds/englishhtml/c0330.htm  http://www.geologyshop.co.uk/chalk.htm http://www.geologyshop.co.uk/chalk.htm  http://commons.wikimedia.org/wiki/File:Calcium-carbonate-xtal- 3D-vdW.png http://commons.wikimedia.org/wiki/File:Calcium-carbonate-xtal- 3D-vdW.png  http://www.chalkstack.com/chalkfacts.html http://www.chalkstack.com/chalkfacts.html  http://www.encyclopedia.com/topic/chalk.aspx http://www.encyclopedia.com/topic/chalk.aspx  http://www.guidechem.com/products/471-34-1.html http://www.guidechem.com/products/471-34-1.html