2020

Study the following table of elements with the first ionisation energy values inkJ.mol-1 and answer the questions that follow. 5.1 Define the term ionisation energy. (2) 5.2 A certain element in the table above is in group II of the periodic table. 5.2.1 Write down: (a) The CHEMICAL NAME of this element (1) (b) The … Read more

Below is the Aufbau diagram of an unknown atom. Study the diagram and answerthe following questions. 4.1 Define the term atomic number. (1) Use the Aufbau diagram of an unknown atom above to answer the followingquestions. 4.2 In which group and period is the atom in the diagram above? (2) 4.3 4.4 How will the … Read more

The following diagram, not drawn to scale, represents the heating curve for a certain substance. Point A represents t = 0 minutes where the substance is a solid. 3.1 Define the term melting point. (2) Use the information in the diagram to answer the following questions 3.2 Write down: 3.2.1 Between which two letters is … Read more

2.1 Define the term element. (2) 2.2 Use the diagram and key provided to answer the following questions. 2.3 Write down the letter of the diagram that represents: 2.3.1 A substance that is solid at room temperature (1) 2.3.2 A mixture that is non-uniform (1) 2.3.3 A pure substance consisting of two or more different … Read more

Four options are provided as possible answers to the following questions. Choose the answer and write only the letter (A–D) next to the question numbers (1.1–1.10) in the ANSWER BOOK, for example 1.11 E. 1.1 Which ONE of the following is a good conductor of electricity? A Wood B Plastic C Silicon D Copper (2) … Read more

11.1 Define the term potential difference. (2) 11.2 In the electric circuit given below, the ammeter and connecting wires have negligible resistance and the battery have no internal resistance. 11.2.1 Calculate the total resistance of the circuit. (3) 11.2.2 Calculate the amount of charge that flows through the 6 Ω in 40 seconds if the … Read more

10.1 A small, metal sphere A carrying a charge of +2 x 10-9 C is placed on aninsulated stand. 10.1.1 How does the number of electrons compare with the number of protons in sphere A? Choose from LESS THAN, GREATER THAN or EQUAL TO. (1) 1013 electrons are now added to sphere A 10.1.2 Calculate … Read more

9.1 Define a magnetic field. (3) 9.2 The diagram below shows a bar magnet. Draw the magnetic field pattern associated with the bar magnet (3) 9.3 Is it possible for a magnet to have one pole? Yes or No. (1) [6]

8.1 Electromagnetic radiation has a wave-particle duality. What does this mean? (2) 8.2 Arrange the following types of electromagnetic radiations in order of decreasing wavelength. Infrared, gamma ray, visible light, x-ray (2) 8.3 Define a photon. (2) An electromagnetic wave has a wavelength of 2,5 x 10-9 m. 8.4 Calculate the amount of energy that … Read more