Sains PT3 | Keradioaktifan (Radioactivity)

1.

Multiple Choice

30 sec

1 pt

Separuh hayat iodin ialah 6 hari. Suatu sampel mengandungi sejumlah iodin tertentu. Selepas 18 hari, hanya 9 g iodin yang tinggal. Berapakah jisim asal iodin tersebut?

The half-life of Iodine is 6 days. The sample contains certain amount of iodine. After 18 days, only 9 g of iodine left. How much is the mass of the Iodine originally?

18 g

36 g

72 g

144 g

2.

Multiple Choice

30 sec

1 pt

Separuh hayat bagi strontium-93 ialah 8 minit. Hitungkan jisim strontium-93 selepas 24 minit dengan jisim asalnya 46.8g.

The half-life of strontium-93 is 8 minutes. Calculate the mass of strontium-93 after 24 minutes with the original mass is 46.8g.

23.4 g

11.7 g

5.85 g

2.93 g

3.

Multiple Select

30 sec

1 pt

Apakah penemuan Marie dan Pierre Curie dalam keradioaktifan?

What is the discovery made by Marie and Pierre Currie in radioactivity?

Menemukan sinar-X

Discover X-ray

Menemukan keradioaktifan

Discover radioactivity

Mengesan pancaran radioaktif

Detect radioactive radiation

Mengekstrak elemen radium dan polonium daripada bijih uranium

Extracted two radioactive elements, polonium and radium from uranium ore

4.

Multiple Choice

30 sec

1 pt

Pilih maksud KERADIOAKTIFAN yang betul.

Choose the CORRECT definition of Radioactivity.

Proses pereputan secara spontan bagi nukleus yang stabil dengan memancarkan sinaran radioaktif

A random and spontaneous decay process of a stable nucleus by emitting radioactive radiation.

Proses pereputan secara spontan bagi nukleus yang tidak stabil dengan memancarkan sinaran radioaktif

A random and spontaneous decay process of an unstable nucleus by emitting radioactive radiation.

5.

Multiple Choice

30 sec

1 pt

Siapakah ahli sains yang menemukan SINAR-X?

Who is the scientist that discover X-ray?

Marie dan Pierre Curi

Antoine Henri Becquerel

Wilhelm Conrad Roentgen

Ernest Rutherford

6.

Multiple Select

30 sec

1 pt

Berikan tiga contoh unsur radioaktif.

Give three examples of radioactive elements.

Carbon-14 (C-14)

Uranium-238 (U-238)

Thorium-232 (Th-232)

Vibranium-123 (V-123)

7.

Multiple Choice

1 min

1 pt

Apakah maksud separuh hayat?

What is the meaning of half-life?

Tempoh masa yang diambil untuk bilangan nukleus yang belum mereput berkurang menjadi setengah daripada nilai asalnya.

The time taken for the number of undecayed nuclei to be

reduced to half of its original value

Tempoh masa yang diambil untuk bilangan nukleus yang sudah mereput berkurang menjadi setengah daripada nilai asalnya.

The time taken for the number of decayed nuclei to be

reduced to half of its original value

8.

Multiple Choice

1 min

1 pt

Apakah kuantiti yang diukur dalam unit keradioaktifan?

What is the quantity measured in radioactivity unit?

Kadar pereputan nukleus unsur radioaktif

The decay rate of an unstable nucleus.

Kadar pereputan proton.

The decay rate of proton.

Kadar pereputan neutron.

The decay rate of neutron.

Kadar pereputan electron.

The decay rate of electron.

9.

Multiple Select

45 sec

1 pt

Namakan dua unit keradioaktifan.

Name two units of radioactivity.

curie (Ci)

becquerel (Bq)

gram per saat (g/s)

watt (W)

10.

Multiple Choice

30 sec

1 pt

Tokoh yang pertama menemukan sinar gama yang dikeluarkan oleh radium ialah:

The first person who discovered gamma rays emitted by radium is:

Marie dan Pierre Curi

Antoine Henri Becquerel

Wilhelm Conrad Roentgen

Ernest Rutherford

11.

Multiple Choice

30 sec

1 pt

Separuh hayat iodin ialah 6 hari. Suatu sampel mengandungi sejumlah iodin tertentu. Selepas 18 hari, hanya 9 g iodin yang tinggal. Berapakah jisim asal iodin tersebut?

The half-life of Iodine is 6 days. The sample contains certain amount of iodine. After 18 days, only 9 g of iodine left. How much is the mass of the Iodine originally?

18 g

36 g

72 g

144 g

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