Worksheet 2.1: Pre-check Complete these questions to check your understanding of some of the basic skills and ideas you will learn about. 1 Understanding matter and energy a If a single atom of an element gains or loses electrons, the resulting particle is called: A a neutron. B an ion. C an isotope. D a quark. b The formula for sucrose (sugar) is C 12H 22O 11. 1 How many different types of atom are there in a sugar molecule? 2 What is the total number of atoms in a single sugar molecule? 2 Understanding stability and change a Which of the following is not a type of chemical reaction? A neutralisation B decomposition C combustion D sublimation b What is the correct chemical equation for the following reaction? hydrochloric acid + calcium carbonate calcium chloride + water + carbon dioxide A HCl + CaCO 3 CaCl 2 + H 2O + CO 2 B HCl + 2CaCO 3 CaCl 2 + H 2O + CO 2 C 2HCl + CaCO 3 CaCl 2 + H 2O + CO 2 D HCl + CaCO 3 2CaCl 2 + H 2O + CO 2
Worksheet 2.2: Create a glossary As you study this topic, make a glossary of new terms that you discover in your textbook. For each new term that you find, use this table to write down the word, its meaning and an example of how it is used. If possible, you should also draw or find a picture to illustrate the word and its meaning. Word Picture Meaning Example of how the word is used
Word Picture Meaning Example of how the word is used
Worksheet 2.3: Predicting the types of bonding Your teacher will assign you one of the following tables to complete. Table 1 For each substance, do research to find its chemical formula, the elements present, how many atoms there are of each element in each molecules, and the type of bonding involved. The first substance has been done as an example. Substance Formula Names of elements aluminium bromide AlBr 3 aluminium bromine 1 3 Number of atoms of each element Total number of atoms in one molecule 4 ionic Type of bonding ammonia hydrogen chloride carbon dioxide copper methane sucrose ammonium chloride
Table 2 For each substance, do research to find its chemical formula, the elements present, how many atoms there are of each element in each molecules, and the type of bonding involved. The first substance has been done as an example. Substance Formula Names of elements aluminium bromide AlBr 3 aluminium bromine 1 3 Number of atoms of each element Total number of atoms in one molecule 4 ionic Type of bonding water sulfur dioxide lead sodium chloride oxygen copper chloride sodium carbonate hydrogen
Worksheet 2.4: Summary of the bonding types In your group, use the table below to summarise the different types of bonding. For each type of bonding, your group needs to note the types of atoms involved, draw a diagram to show the bonding, and provide everyday examples, physical properties and some interesting facts. Once you have completed the table, your teacher will explain the next stage of the activity. Type of Bonding Types of atoms involved Diagram Every day examples Physical Properties Interesting facts ionic covalent metallic
Worksheet 2.5: Ionic bonding game Your teacher will assign you an ion. Write down its name and symbol on three pieces of card, then string the cards around your neck so that they can easily be read. Now move around the room and pair up by making ionic bonds with other students. Once you have a bond, work out how many ions are needed so that the formula is balanced, and write down the name and formula of the balanced compounds in the table below. Continue moving around, making bonds and recording formulas until your teacher tells you to stop. Name of compound Formula of compound Name of compound Formula of compound
Worksheet 2.6: Writing ionic formulas Colour each of these ion shapes, cut them out and use them to create ion models.
Worksheet 2.7: Classifying chemicals Consult the list of common chemicals on page 41 of your textbook. 1 Write the formula of each chemical in the column that matches the kind of bonding they contain. The first one has been done as an example. Ionic Metallic Covalent NaHCO 3 NH 3
Ionic Metallic Covalent 2 From the list, select five chemicals that you have not heard of before, and research their uses. Chemical Uses
Worksheet 2.8: Diatomic molecules Colour each of these molecule shapes and then cut them out. You need to colour them consistently, e.g. all hydrogen molecules white, all oxygen molecules red. Once you have cut out the molecules, use them to complete the activity on page 44 of your textbook.