6.1 SEPARUH HAYAT Cikgu Ilani 2021

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8.Rajah menunjukkan graf bilangan nukleus
radioaktif melawan masa untuk satu sampel
radioaktif Q.

(a)Tentukan separuh hayat bahan radioaktif Q.

(b)Tunjukkan pada graf bagaimana anda
menentukan separuh hayat.

(c)Berapakah bilangan nukleus radioaktif
yang belum mereput selepas 25 minit.

(d)Hitungkan peratus bilangan nukleus
radioaktif yang masih tinggal selepas 45
minit.

TUTORIAL 6.1



Leader Board Results





Multiple Choice Submissions

Details can be found in the Notes section below





Leader Board Results





Leader Board Results

Multiple Choice Submissions

Details can be found in the Notes section below





Leader Board Results

Multiple Choice Submissions

Details can be found in the Notes section below





Leader Board Results

Multiple Choice Submissions

Details can be found in the Notes section below



Negatively charged
Bercas negatif

12

Short half-life so it is safe
Separuh hayat pendek, ia lebih selamat

1 → ½ → ¼ → 1/8
3 x 12 hours = 36 hours

The unstable nucleus to

become stable.

Time taken for radioactive substance Nukleus tidak stabil menjadi
lebih stabil
to decay to half of its original

mass/activity

Masa diambil untuk bahan radioaktif

mereput menjadi separuh daripada

jisim /aktiviti asal

32/8 = 4T1/2
200→100→50→25 →12.5 g

Neutral / no charge / high energy / high
penetrating power / electromagnetic wave
Tiada cas / tenaga tinggi / kuasa penembusan
tinggi / gelombang elektromagnet

Background reading // 1 → ½ → ¼ → 1/8 // 3T1/2 // 18
Bacaan latar belakang 3
Background radiation / cosmic
rays Sinar latarbelakang // T1/2 = 6 hours
Sinar semulajadi / sinar kosmik

24 12

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