XMS SEC 3 WA1 2022 QP

3 6092/Chemistry/2022 WA1 Section A [5 marks] Answer all questions. Write your answers in the boxes provided at the end of the Section. 1 Which of the following is a compound? A air B carbon C oxygen D steam 2 Which statement about atoms is correct? A The mass of an atom is almost entirely due to its nucleus. B The electrons and neutrons attract one another. C The protons and neutrons have opposite charges. D The shell nearest to the nucleus always contains the most electrons. 3 The diagram of an ion is shown. What can be deduced about the number of protons in this ion? A It has 9 protons. B It has 10 protons. C It has 11 protons. D The number of protons cannot be deduced from this diagram.

4 6092/Chemistry/2022 WA1 4 The diagram shows part of the Periodic Table. Which element is correctly matched with its electronic configuration? A 2.8.1 B 2.4 C 2.8.2 D 2.8 5 A large beaker containing nitrogen gas (N2) was placed over a porous pot containing carbon dioxide gas (CO2) as shown below. How would the water levels at P and Q change after a few minutes and after a long time? after a few minutes after a long time A lower at P than Q higher at P than Q B lower at P than Q same at P and Q C higher at P than Q same at P and Q D higher at Q than P higher at Q than P P Q

5 6092/Chemistry/2022 WA1 Write your answers for Section A in the boxes below. 1. 2. 3. 4. 5. Section B [30 marks] Answer all questions. Write your answers in the spaces provided. B1 The table below gives the number of protons, neutrons and electrons in some particles. particle protons neutrons electrons A 17 18 17 B 17 20 17 C 17 18 18 D 20 20 20 E 37 48 37 (a) Using the data in the table, explain which particle is an ion. ……………………………………………………………………………………………… [1] (b) Using the data in the table, identify two atoms that are isotopes and explain your choice. ……………. and …………… are isotopes. Reason: ……………………………………………………………………………………………… [2] (c) A substance Z is formed when particles A and D react. Draw a ‘dot-and-cross’ diagram to show the arrangement of the outer shell electrons of the particles in Z. [3]

6 6092/Chemistry/2022 WA1 B2 (a) The diagram shows a kettle of boiling water. As the water vapour cools, it turns back to water droplets. Describe this change of state in terms of the kinetic particle theory. In your answer, include • the difference in the closeness of the water molecules as the water vapour changes to water, • the difference in the motion of the water molecules as the water vapour changes to water, • the difference in the strength of the attractive forces between the water molecules as t