Worksheetshalf life & radioisotopes
Total questions: 10
Worksheet time: 24mins
Diagram shows the decay curve of a radioactive substance.
Rajah menunjukkan lengkungan reputan bagi satu bahan radioaktif.
If the initial activity of the radioactive substance is 160 counts per second, what is the activity after 90 days?
Jika keaktifan awal bagi bahan radioaktif itu ialah 160 bilangan per saat, berapakah keaktifannya selepas 90 hari?
2.5
5.0
13.3
26.7
What is the use of radioisotopes in the field of archaeology?
Apakah kegunaan radioisotop dalam bidang arkeologi?
To determine the age of artifacts
Untuk menentukan usia bahan purba
To determine the mass of artifacts
Untuk menentukan jisim bahan purba
To determine the half-life of artifacts
Untuk menentukan setengah hayat bagi bahan purba
To determine the chemical content in artifacts
Untuk menentukan kandungan kimia dalam bahan purba
A radioactive radiation is used to control the thickness of metal sheet in a metal manufacturing industry. Which of the following radioactive radiation is used?
Satu sinaran radioaktif digunakan untuk mengawal ketebalan kepingan logam dalam industri pembuatan logam. Antara sinaran radioaktif yang berikut, manakah digunakan?
X-ray Sinar-X
gamma ray Sinar gama
alpha particles Zarah alfa
beta particles Zarah beta
Which of the following is not the use of radioactive radiations?
Antara yang berikut, manakah bukan kegunaan sinaran radioaktif?
To detect and treat the brain tumour
Untuk mengesan dan mengubati tumor otak
To determine the wear of engine parts
Untuk menentukan kehausan bahagian enjin
To detect object under surface of sea
Untuk mengesan objek di bawah permukaan laut
To detect leakage of underground water pipe
Untuk mengesan kebocoran paip air bawah tanah
Radium-226 (Ra) has an atomic number of 88 and atomic mass 226. It is part of the Uranium decay series. Ra-226 decays into ____ by emitting an alpha partical
Radon -222
Lawrencium-226
Radium-88
Thorium-232
The % of the parent isotope remaining after 3 Half Lives.
50%
25%
12.5%
6.25%
What is the Half life of this isotope?
5 seconds
10 seconds
15 seconds
20 seconds
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