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SOLAF CHEMISTRY SPM 2014 THE STRUCTURE OF THE ATOM -
Isotopes And Their Importance
ESSAY QUESTION
FORM 4
CHAPTER 2 : THE STRUCTURE OF THE ATOM
STRUKTUR ATOM
SUBTOPIC : Isotopes And Their Importance
Isotop Dan Kepentingannya
1. (a) 1. Explain the meaning of an isotope using an example.
Terangkan maksud isotop dengan menggunakan satu contoh.
Aras sederhana [5 marks/markah]
b)
Using a suitable example, explain the statment above.
Dengan menggunakan contoh yang sesuai, terangkan pernyataan ini.
Aras tinggi [6 marks/markah]
c) Explain the use of isotopes in the fields of archaeology, medicine, agriculture and
industry.
Terangkan kegunaan isotop dalam kehidupan harian dalam bidang arkeologi,
perubatan, pertanian dan perindustrian.
Aras tinggi [9 marks/markah]
1
Isotopes are from the same element.
Isotop-isotop adalah daripada unsur yang sama.
SOLAF CHEMISTRY SPM 2014 THE STRUCTURE OF THE ATOM -
Isotopes And Their Importance
2
2. (a) Uranium-235 and uranium-238 are two isotopes of uranium.
Table below shows the numbers of the subatomic particles in an atom of uranium-
235.
Uranium-235 dan uranium-238 adalah dua isotop bagi uranium.
Jadual di bawah menunjukkan bilangan zarah-zarah sub-atom dalam satu atom
uranium-235.
Sub-atomic particle
Zarah sub-atom
Number
Bilangan
Electron
Elektron
92
Neutron
Neutron
143
Proton
proton
92
(i) State the number of electrons and neutrons in an atom of uranium-238.
Nyatakan bilangan elektron dan bilangan neutron dalam satu atom uranium-
238.
Aras sederhana [ 2 mark/ markah]
(ii) Explain why these two atoms of uranium are isotope?
Terangkan mengapa dua atom uranium ini adalah isotop?
Aras sederhana [ 2 mark/ markah]
(b) X is a substance that has melting point of 43°C and boiling point of 89°C.
X adalah sebatian yang mempunyai takat lebur 43°C dan takat didih 89°C.
(i) Sketch a graph of temperature against time when substance X is heated
from 30°C to 100°C.
Lakarkan satu graf suhu terhadap masa apabila X dipanaskan dari 30°C
kepada 100°C.
Aras sederhana [ 3 mark/ markah]
(ii) Compare in terms of arrangement of particles, force of attractive and kinetic
energy when substance X is at 30°C and 80°C.
Bandingkan dari segi susunan zarah, daya tarikan dan tenaga kinetik
apabila bahan X adalah pada suhu 30°C dan 80°C.
Aras sederhana [ 6 mark/ markah]
(c) Chemical analysis shows that compound P contains 74.10% carbon, 8.64%
hydrogen and 17.26% nitrogen. The relative molecular mass of P is 162.
Determine the molecular formula of P.
Analisa kimia menunjukkan yang sebatian P mengandungi 74.10% karbon, 8.64%
hidrogen dan 17.26% nitrogen. Jisim molekul relatif P ialah 162. Tentukan formula
molekul P.
[ Relative atomic mass : H=1 ; C=12 ; N=14 ]
Aras tinggi [ 7 mark/ markah]
SOLAF CHEMISTRY SPM 2014 THE STRUCTURE OF THE ATOM -
Isotopes And Their Importance
3

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Esei

  • 1. SOLAF CHEMISTRY SPM 2014 THE STRUCTURE OF THE ATOM - Isotopes And Their Importance ESSAY QUESTION FORM 4 CHAPTER 2 : THE STRUCTURE OF THE ATOM STRUKTUR ATOM SUBTOPIC : Isotopes And Their Importance Isotop Dan Kepentingannya 1. (a) 1. Explain the meaning of an isotope using an example. Terangkan maksud isotop dengan menggunakan satu contoh. Aras sederhana [5 marks/markah] b) Using a suitable example, explain the statment above. Dengan menggunakan contoh yang sesuai, terangkan pernyataan ini. Aras tinggi [6 marks/markah] c) Explain the use of isotopes in the fields of archaeology, medicine, agriculture and industry. Terangkan kegunaan isotop dalam kehidupan harian dalam bidang arkeologi, perubatan, pertanian dan perindustrian. Aras tinggi [9 marks/markah] 1 Isotopes are from the same element. Isotop-isotop adalah daripada unsur yang sama.
  • 2. SOLAF CHEMISTRY SPM 2014 THE STRUCTURE OF THE ATOM - Isotopes And Their Importance 2 2. (a) Uranium-235 and uranium-238 are two isotopes of uranium. Table below shows the numbers of the subatomic particles in an atom of uranium- 235. Uranium-235 dan uranium-238 adalah dua isotop bagi uranium. Jadual di bawah menunjukkan bilangan zarah-zarah sub-atom dalam satu atom uranium-235. Sub-atomic particle Zarah sub-atom Number Bilangan Electron Elektron 92 Neutron Neutron 143 Proton proton 92 (i) State the number of electrons and neutrons in an atom of uranium-238. Nyatakan bilangan elektron dan bilangan neutron dalam satu atom uranium- 238. Aras sederhana [ 2 mark/ markah] (ii) Explain why these two atoms of uranium are isotope? Terangkan mengapa dua atom uranium ini adalah isotop? Aras sederhana [ 2 mark/ markah] (b) X is a substance that has melting point of 43°C and boiling point of 89°C. X adalah sebatian yang mempunyai takat lebur 43°C dan takat didih 89°C. (i) Sketch a graph of temperature against time when substance X is heated from 30°C to 100°C. Lakarkan satu graf suhu terhadap masa apabila X dipanaskan dari 30°C kepada 100°C. Aras sederhana [ 3 mark/ markah] (ii) Compare in terms of arrangement of particles, force of attractive and kinetic energy when substance X is at 30°C and 80°C. Bandingkan dari segi susunan zarah, daya tarikan dan tenaga kinetik apabila bahan X adalah pada suhu 30°C dan 80°C. Aras sederhana [ 6 mark/ markah] (c) Chemical analysis shows that compound P contains 74.10% carbon, 8.64% hydrogen and 17.26% nitrogen. The relative molecular mass of P is 162. Determine the molecular formula of P. Analisa kimia menunjukkan yang sebatian P mengandungi 74.10% karbon, 8.64% hidrogen dan 17.26% nitrogen. Jisim molekul relatif P ialah 162. Tentukan formula molekul P. [ Relative atomic mass : H=1 ; C=12 ; N=14 ] Aras tinggi [ 7 mark/ markah]
  • 3. SOLAF CHEMISTRY SPM 2014 THE STRUCTURE OF THE ATOM - Isotopes And Their Importance 3