No. |
Question |
Answer |
| 1 | What is the middle of the atom called? | The nucleus. |
| 2 | What two types of particle are found here? | Protons and neutrons. |
| 3 | The electrons are arranged in shells (also called energy levels). How many can be held in the first shell? | Two. |
| 4 | How many can be held in the second shell? | Eight. |
| 5 | How many can be held in the third shell? | Eight. |
| 6 | Where are the non-metals located in the periodic table? | In the top right-hand corner. |
| 7 | What are the horizontal rows in the periodic table called? | Periods. |
| 8 | What are the vertical columns called? | Groups. |
| 9 | What is the name of Group 1? | The Alkali Metals. |
| 10 | What is the name of Group 7? | The Halogens. |
| 11 | What is the name of Group 0? | The Noble Gases. |
| 12 | Elements in the same group have the same number of what? | The same number of outer electrons. |
| 13 | Do elements in the same group have similar chemical or similar physical properties? | Similar chemical properties. |
| 14 | Elements in the periodic table are arranged in order of what? | Increasing atomic number. |
| 15 | Which of these elements has the greatest atomic number?
| Element B. |
| 16 | What is the electron arrangement of element C? | 2.8.7 |
| 17 | What is the electron arrangement of element E? | 2.8.1 |
| 18 | Which of the elements are very reactive metal and why? | Elements D & E - they are in Group 1 (The alkali metals). |
| 19 | Which of the elements is a very unreactive non-metal and why? | Element F - it is in Group 0 (The noble gases). |
| 20 | Name the first four halogens. | 1. Fluorine 2. Chlorine 3. Bromine 4. Iodine |
| 21 | What happens to the reactivity of the halogens as you go down the group (increasing atomic number)? | They become less reactive. |
| 22 | What happens to the colour of these elements down the group? | They become darker in colour. |
| 23 | What happens to the boiling point of these elements down the group? | Their boiling points increase. |
| 24 | What does fluorine look like? | A pale yellow gas. |
| 25 | What does chlorine look like? | A green gas. |
| 26 | Name two uses for chlorine. | 1. Killing bacteria in water. 2. Making bleaches. |
| 27 | What does bromine look like? | A red -brown liquid (which evaporates easily to make an orange-brown gas). |
| 28 | What colour is bromine dissolved in water? | Orange-brown. |
| 29 | What is the name of the compound formed when potassium reacts with bromine? | Potassium bromide. |
| 30 | What colour is this compound when dissolved in water? | Colourless. |
| 31 | What does iodine look like? | A shiny grey-black solid (which produces a purple gas when gently heated). |
| 32 | What colour is iodine dissolved in water? | Brown. |
| 33 | What is this iodine solution used for? | An antiseptic. |
| 34 | What is the name of the compound formed when sodium reacts with iodine? | Sodium iodide. |
| 35 | What colour is this compound when dissolved in water? | Colourless. |
| 36 | What is the name of compounds of the halogens? | Halides. |
| 37 | List two observations when sodium reacts with chlorine. | 1. The metal burns with a yellow flame. 2. A white solid is produced. |
| 38 | What is the name of the product of this reaction? | Sodium chloride. |
| 39 | What is its chemical formula? | NaCl |
| 40 | List two observations when iron wool reacts with chlorine. | 1. The metal glows red. 2. A brown solid is produced. |
| 41 | What is the name (and chemical formula) of the product this time? | Iron chloride (FeCl3). |
| 42 | What is formed in this reaction: bromine + potassium iodide? | potassium bromide + iodine |
| 43 | Which of these compounds will NOT react with chlorine: a) sodium fluoride; b) potassium bromide? | sodium fluoride (Chlorine is less reactive than fluorine and so cannot displace it from fluorides.) |
| 44 | What is a compound? | A substance made by chemically joining two or more elements together. |
| 45 | "Compounds have similar properties to the elements they are made from." Is this true or false? | False - they have completely different properties, eg sodium chloride is nothing like either sodium or chlorine. |
| 46 | What is the name for the substances on the left of a chemical equation? | The reactants (or starting materials). |
| 47 | What is the name for the substances on the right? | The products. |
| 48 | What do the symbols (s), (l) and (g) stand for in chemical equations? | Solid, liquid and gas |
| 49 | What does the symbol (aq) stand for in chemical equations? | Aqueous (which means dissolved in water). |
| 50 | What is meant by reaction rate? | How fast a reaction goes. |
| 51 | List four ways of increasing the rate of a reaction. | 1. Increasing the temperature. 2. Increasing the concentration of a reactant. 3. Increasing the surface area of a solid.4. Adding a catalyst. |
| 52 | What is a catalyst? | A chemical which speeds up a reaction but which does not get used up. |
| 53 | Does the catalyst appear in the chemical equation for the reaction? | No (because it does not get used up). |
| 54 | What are enzymes? | Catalysts produced by living things. |
| 55 | Why don't enzymes work if the temperature is too high? | They become denatured (damaged) by the heat. |
| 56 | What two things about line A show that it represents a faster reaction?
| 1. It starts more steeply. 2. It levels off sooner. |
| 57 | How can you tell that both lines A and B were obtained using the same amounts of the reactants? | They both produced the same amount of product in the end. |
| 58 | Increasing the temperature makes the particles move around more quickly. Give two reasons why this makes the reaction faster. | 1. The collisions occur more often. 2. More of the collisions have enough energy to lead to a reaction. |
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