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MODUL • Fizik TINGKATAN 5

1
3 Rajah 3 menunjukkan satu model atom hidrogen, H 6 Semasa pembelahan nuklear, jumlah tenaga yang
1
1
Diagram 3 shows a model of hydrogen atom, H dilepaskan ialah 1.650 × 10 J. Apakah cacat jisim dalam
–3
1
Kunci / Key : tindak balas nuklear itu?
During a nuclear fission, the amount of energy released
+ proton / proton is 1.650 × 10 J. What is the mass defect in the nuclear
–3
- elektron / electron reaction?
+
8
–1
neutron / neutron [Laju cahaya / Speed of light, c = 3.00 × 10 m s ]
A 5.5 × 10 kg
–12
B 9.075 × 10 kg
–15
–20
- C 1.833 × 10 kg
–23
Rajah 3 / Diagram 3 D 3.025 × 10 kg
Rajah manakah yang menunjukkan model isotop hidrogen,
3
atom tritium, H? / Which diagram shows the model for 7 Persamaan berikut mewakili pelakuran nukleus.
1
3
isotope of hydrogen, tritium atom, H? The following equation represents a nuclear fusion.
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A C
2 3 4 1 n Tenaga
1 H + H He + + Energy
2
0
1
+ +
+
+ Jika tenaga yang dibebaskan semasa tindak balas tersebut
itu ialah 5.64 x 10 J, hitung cacat jisim daripada tindak
–12
- - balas itu.
B D If the energy released in the above reaction is 5.64 × 10 –12 J,
calculate the mass defect from the reaction.
–27
–1
8
- [1 u = 1.66 × 10 kg; c = 3.0 × 10 m s ]
+ + + A 0.009432 u
- B 0.018863 u
C 0.037751 u
- - D 0.075452 u
8 Jadual 8 menunjukkan maklumat bagi empat sampel
4 Radioisotop manakah yang paling sesuai digunakan sebagai radioaktif. / Table 8 shows the information of four different
penyurih dalam badan manusia? / Which radioisotope is the radioactive samples.
most suitable to be used as a tracer in the human body? Setengah
Radioisotop Separuh hayat Sampel radioaktif hayat Sinaran radioaktif
Radioisotope Half-life Radioactive sample Half-life Radioactive emission
A P 30 saat / 30 seconds Kobalt-60 5 tahun Gama
B Q 13 jam / 13 hours Cobalt-60 5 years Gamma UNIT 5
C R 4 bulan / 4 month Strontium-90 28 tahun Beta
Strontium-90 28 years Beta
UNIT 5
D S 5 tahun / 5 years
Iodin-131 8 hari Gama
5 Persamaan berikut menunjukkan penyusutan jisim Iodine-131 8 days Gamma
nukleus X.
The following equation shows the decay of the nuclide X. Polonium-210 140 hari Alfa
226 P 4 Polonium-210 140 days Alpha
Y
X
88 Q + 2 He
Apakah nilai P dan Q? / What are the values of P and Q? Jadual 8
Table 8
P Q Sampel manakah yang paling sesuai untuk pemeriksaan
ginjal? / Which sample is the most suitable to be used for
A 230 90 examining the kidney?
B 230 86 A Kobalt-60 / Cobalt-60
B Strontium-90 / Strontium-90
C 222 90 C Iodin-131 / Iodine-131
D 222 86 D Polonium-210 / Polonium-210

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