1.4) Let's Focus on Compounds and Mixtures
The billions of substances that make up our Universe are all made up of about 120 ELEMENTS. We need to learn about how they combine to form new substances as well as learn about some of the exciting new materials that scientists are making in the laboratory.
​Reference: CS4 Section 9.5) Compounds pg 286 - 289
CompoundsMost substances that you encounter in everyday life are made up of more than one type of atom. These are called compounds. Compounds are formed from at least two or more different types of atoms that are chemically bonded together. Like elements, every compound has a unique set of characteristics. These properties are usually very different to the properties of the elements that make up the compound.
Think of table salt which is made of sodium and chlorine |
Practical - Constructing CompoundsWith the molymod kits create the following compounds:
1) water 2) carbon dioxide 3) glucose - use the instruction sheet in the molymod kit to make glucose 4) hydrochloric acid 5) sulfuric acid NOTE: Halogens are green and they include fluorine and chlorine. A) Draw a picture of each compound that you have built. B) Create a table with the three headings - Substance, Chemical Formula, Number and Type of Atoms and fill in for each of the 5 substances that you have made. For example: salt has the chemical formula NaCl which means it has 1 sodium atom and 1 chorine atom. |
Revision:
Complete the following questions from CS4 pg 289 Q 7, 8, 9, 12, and Q11
Complete the following questions from CS4 pg 289 Q 7, 8, 9, 12, and Q11