Structure Question (Structure of atom)

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Structure Question (Structure of atom)

  1. 1. STRUCTURE OF ATOMSTRUCTURE QUESTION 1 Figure 1.1 shows the standard representation of five elements . 16 24 35 40 14 O Mg Cl Ca C 8 12 17 20 6 FIGURE 1.1 Based on the above elements, answer the following questions: (a) State the two elements which have similar chemical properties. ..……………………………………………………………………………………...... [1 mark] (b) Explain your answer in (a). ……………………………………………………………………….......................... [1 mark] (c) Write the electron arrangement for the ion formed from Cl. ……………………………………………………………………………………........ [1 mark] (d) What is the number of valency electrons found in atom C? ………………………………………………………………………………………... [1 mark] (e) Draw the electron arrangement for atom O. [2 marks]
  2. 2. (f) Figure 1.2 shows three types of hydrogen atoms. F e e e p p n n p n Hydrogen Deuterium Tritium FIGURE 1.2 (i) Name the positively charged sub-atomic particles found in the nucleus. ………………………………................................................................................ [1 mark] (ii) What is the name given to atoms which have the same number of protons but different number of neutrons? …………………………………………………………………………….......... [1 mark] (iii) State the nucleon number for the tritium atom . ………………………………………………………………………….............. [1 mark]
  3. 3. JAWAPAN 1 (a) Q, S 1 1 (b) Have the same number of valence electron/ In the same Group. 1 1 (c) 2.8.8 1 1 (d) 4 1 1 (e) 1. Have nucleus and the correct number of atomic shell. 1 2. Electron number correctly plot on each of the shells. 1 o 2 (f)(i) proton 1 (ii) isotope 1 (iii) 3 1 3 JUMLAH 92. Figure 1 shows an experiment to investigate the diffusion process. Gas jar After several hours Purple coloured gas Solid iodine FIGURE 1 (a) State the type of diffusion in this experiment .......................................................................................................................... [1 mark]
  4. 4. (b) Draw the arrangement of the iodine particles in the solid and gaseous state. Solid Gas [2 marks] (c) State the type of particles in gaseous iodine ........................................................................................................................... [1 mark](d) (i) State the change in the matter state of iodine in this experiment. .................................................................................................................... [1 mark] (ii) Name the process for the change of states in (d)(i) .................................................................................................................... . [1 mark] (e) Explain, using the kinetic theory of matter, why the purple coloured gas diffuses faster if the gas jar is immersed in hot water. ............................................................................................................................. ............................................................................................................................. .. [2 marks] (f) Normal car perfume placed inside the car will diffuse to give a fragrant smell. State the heat change undergo by the perfume. ............................................................................................................................. [1 mark]JAWAPAN 1(a) Correctly state the type of diffusion
  5. 5. Contoh jawapan: Gas 1 1 1(b) Correctly draw particles arrangement • Particles draw must at least in three row • Particles are arrange closely. • Packed orderly in fixed position. Examples Answer: Solid 1 [Can draw • At least three iodine particles • Iodine particles are separated from one another] Gas 1 2 1(c) [Correctly state the type of particles] Example answer: Molekul 1 11(d)(i) [Correctly state the change of the state of matter] Contoh jawapan: Pepejal kepada gas/ Pepejal gas 1 11(d)(ii) [Spell correctly the process] Contoh jawapan: Sublimation 1 1 1(e) [Explain thoroughly • Heat change • Kinetic energy change By the iodine particles] Contoh jawapan:
  6. 6. Iodine particles get heat/ energy and 1 Kinetic energy of iodine particles increase/ iodine particles move randomly and rapidly. 1 21(f) [Correctly state the change in heat ] Contoh jawapan: Heat diffused/ Endotermik 1 1 9
  7. 7. ESSAY QUESTION

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