Radioactivity - O level

1.

Multiple Choice

30 sec

1 pt

The rate at which a radioactive element decays is its ____.

quarter life

whole life

wonderful life

half life

2.

Multiple Choice

30 sec

1 pt

In a nuclear reactor, electricity is produced from what element?

Plutonium

Uranium 235

Radon 220

Lead 232

3.

Multiple Choice

30 sec

1 pt

Both a fusion reaction and a fission reaction produce

Kinetic energy

Chemical energy

sound energy

Thermal energy

4.

Multiple Choice

45 sec

1 pt

what's the half life of this substance?

1 day

2 days

3 days

4 days

5.

Multiple Choice

30 sec

1 pt

___________ Is the use of radioactivity in agriculture to sterilize food.

Pasteurization

Irradiation

Fission

Decay

6.

Multiple Choice

30 sec

1 pt

Name the instrument used to detect radioactivity.

voltmeter

ohmeter

seismograph

geiger counter

7.

Multiple Choice

30 sec

1 pt

Which type of radiation is the most penetrating?

Alpha

Beta

Gamma

8.

Multiple Choice

30 sec

1 pt

In order of most to least penetrating radiation we have

Alpha , Beta, Gamma

Beta , Gamma , Alpha

Gamma, Beta, Alpha

Gamma, Alpha, Beta

9.

Multiple Choice

30 sec

1 pt

If we start off with element ₂₄X^50* after an gamma decay we get another element that looks like

₂₄X^50*

₂₃X⁵⁰

₂₄X⁵⁰

_25X⁵⁰

10.

Multiple Choice

30 sec

1 pt

If we start off with element ₂₄X⁵⁰ after a beta decay we get another element Y that looks like

₂₃Y⁵⁰

₂₂Y⁴⁶

₂₅Y⁵⁰

₂₄Y⁵⁰

11.

Multiple Choice

2 mins

1 pt

If we start off with element ₂₄X⁵⁰ after an alpha decay we get another element Y that looks like

₂₂Y⁵⁰

₂₂Y⁴⁶

₂₀Y⁴⁸

₂₆Y⁵⁴

12.

Multiple Choice

30 sec

1 pt

How many protons and neutrons in ₂₄X⁵⁰

P = 24 N = 50

P = 24 N = 26

P = 26 N = 24

P = 50 N = 24

13.

Multiple Choice

1 min

1 pt

Has the symbol

Alpha

Beta

Gamma

14.

Multiple Choice

1 min

1 pt

Has a mass of 4 and a charge of +2

Alpha

Beta

Gamma

15.

Multiple Choice

30 sec

1 pt

Which type of nuclear radiation is being emitted here?

Alpha

beta

gamma

none

16.

Multiple Choice

30 sec

1 pt

Takes two small nuclei and combines them into a larger nucleus

fission

fusion

17.

Multiple Choice

1 min

1 pt

The splitting of a large nucleus into two smaller nuclei is

fusion

fission

half-life

gamma radiation

18.

Multiple Choice

1 min

1 pt

This is an example of...

Fission reaction

Fusion reaction

Decomposition reaction

Decay

19.

Multiple Choice

30 sec

1 pt

Where does fusion occur naturally?

Underwater

All around us

In the radioactive waste

On the sun

20.

Multiple Choice

30 sec

1 pt

Requires temperatures of millions of degrees?

Fission

Fusion

21.

Multiple Choice

30 sec

1 pt

Americium - 241 has a half life of 400 years. If a sample contains 24 grams starts to decay, after how long will 3 grams be left?

400 yrs

800 yrs

1200 yrs

1600 yrs

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