Radioactivity

Radioactivity

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Multiple Choice

All background radiation comes from natural sources.

• True

• False

Multiple Choice

What is the most common source of background radiation?

• Radium

• Nuclear waste

• Radon

• Cosmic rays

Multiple Choice

Which of these is the most suitable description of background radiation?

• A measure of the level of ionising radiation present in the environment at a particular location

• A measure of how much radiation you absorb

• A measure of radiation that comes from space only

• A measure of radiation that comes from the buildings

Multiple Choice

Name the instrument used to detect radioactivity.

• voltmeter
• ohmeter
• seismograph
• geiger counter

Multiple Choice

Which charge does gamma radiation have?

• positive

• negative

• it has no charge

Multiple Choice

Which charge does alpha particle have?

• positive

• negative

• it has no charge

Multiple Choice

Finish the following alpha decay reaction:

Multiple Choice

Alpha particles are nuclei are

• Helium

• Iron

• Carbon

• Uranium

Multiple Choice

Which radiation carries no charge

• alpha

• beta

• gamma

Multiple Choice

Which particles are negatively charged

• alpha

• beta

• gamma

Multiple Choice

Solve this equation for beta decay.

₂₇⁶⁰Co = ___ + _-1⁰e

• ₂₅⁵⁶Mn

• ₂₈⁶⁰Ni

• ₂₃⁵⁸V

• ₂₇⁵⁹Co

Multiple Choice

Solve this equation for alpha decay.

₈₅²⁰⁹At = ___ + ₂⁴He

• ₈₃²⁰⁵Bi

• ₈₆²⁰⁹Rn

• ₈₁²⁰⁷Tl

• ₈₅²⁰⁸At

Multiple Choice

Finish this equation

²⁰⁹₈₃Bi--> _{_______ +} ²⁰⁵₈₁Tl

• ⁴₂He

• ⁰_-1e

• y

Multiple Choice

What type of decay is shown here

²³⁸₉₂U ---> ²³⁴₉₀Th + ⁴₂He.

• alpha

• beta

• gamma

Multiple Choice

An alpha particle is made up of

• 2 protons and 4 neutrons

• 1 proton and 1 neutron

• 2 protons and 2 neutrons

• 4 protons and 2 neutrons

Multiple Choice

Which type of radioactive decay is occurring in this equation?

• Alpha decay

• beta decay

• gamma decay

• positron emission

Multiple Choice

What makes something radioactive?

• elements with an atomic number above 81

• an unstable nucleus

• contaminated sewage

• It decays over time

Multiple Choice

What type of radiation can be stopped by clothing or a piece of paper?

• Alpha radiation
• Beta radiation
• gamma radiation