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C8 RADIOACTIVE

Total questions: 20

Worksheet time: 1hrs 10mins

Name
Class
Date
1.

Antoine Henri Becquerel has discovered...

a)

A. ionising power

b)

B. X-rays

c)

C. radioactivity

d)

D. polonium and radium

2.

Below is the Scientist that involved with radioactivity discovery...

a)

A. Marie and Pierre Curie

b)

B. Marrie and Pierre Wilhelm

c)

C. Marie and Henri

d)

D. Marie and Becquerel

3.

Radioactive radioation consist of...

a)

alpha radiation

b)

ionising radiation

c)

beta radiation

d)

gamma ray

4.

"A random and spontaneous process where an unstable nucleus emits radioactive radiation until the nucleus becomes more stable.."

The statement above refer to...

a)

A. Half -life

b)

B. Nuclei decay

c)

C. Radioactivity

d)

D. Radioactive decay

5.

Iodin-131 decays with half-life is 8 days to become Xenon-131. Calculate the mass of Iodin-131 after 24 days with a mass of 60g.

a)

A. 7.5 g

b)

B. 8.5 g

c)

C. 12.5 g

d)

D. 15.5 g

6.

All examples below were radioactive substance, excpet for....

a)

A. Uranium-235

b)

B. Radon-222

c)

C. Thorium-234

d)

D. Carbon-16

7.

What happen to the oxygen atom?

a)

A. Loses 1 electron

b)

B. Received 2 electrons

c)

C. Nothing happen

d)

D. Have +2 charges

8.

Which of the following above is neutral?

a)

A. P

b)

B. Q

c)

C. R

d)

D. S

9.

The diagram abpve shows one source of ionising radiation. Choose from the answer below the natural ionising radiation.

a)

A. Nuclear test

b)

B. Nuclear accidents

c)

C. Cosmic radiation

d)

D. Radioisotopes in medicine

10.

Note : Ionising radiation dose of televisyen : 0.01mSv/h


Everydays, Batani will watch televisyen for 6 hours. Calculate the dose of ionising radiation received by Ahmad if he repeats the habit for a week.

a)

A. 0.21 mSv

b)

B. 042 mSv

c)

C. 0.40 mSv

d)

D. 0.42 mSv

11.

Isotope K is used in the treatment of cancer. What is isotope K?

a)

Americium-241

b)

Cobalt-60

c)

Iodine-131

d)

Uranium-235

12.

Which of the following isotopes is used in generating electricity?

a)

Iodine-131

b)

Sodium-24

c)

Uranium-235

d)

Carbon-14

13.

The half-life of arsenic is 18 days.

A sample contains a certain amount of arsenic

After 72 days, only 10 g of the arsenic still remains.

What is the initial mass of the arsenic?

a)

160 g

b)

90 g

c)

90 g

d)

72 g

14.

Which type of nuclear radiation can be stopped by a sheet of paper?

a)

Alpha

b)

Beta

c)

Gamma

15.
Name the instrument used to detect radioactivity.
a)
voltmeter
b)
ohmeter
c)
seismograph
d)
geiger counter
16.
What makes something radioactive?
a)
elements with an atomic number above 81
b)
an unstable nucleus
c)
contaminated sewage
d)
It decays over time
17.
Which type of radiation releases an electron?
a)
Alpha radiation
b)
Beta radiation
c)
gamma radiation
18.

Which radiation carries no charge

a)

alpha

b)

beta

c)

gamma

19.
Negatively charged particles emitted from a nucleus at a high speed are ____.  
a)
alpha particle
b)
gamma rays
c)
beta particles
d)
X rays
20.

What is radioactivity?

a)

A decay process of stable nucleus by emitting electromagnetic radiation

b)

A decay process of unstable nucleus by emitting electromagnetic radiation

c)

A decay process of stable nucleus by emitting radioactive radiation

d)

A decay process of unstable nucleus by emitting radioactive radiation