Types of Radiations

Alpha Beta and Gamma radiation

by Cameron Scott

​In this lesson

​You will be able to understand the differences between the three typpes of particles apha, beta and gamma

​You will watch some videos and answer multiple choice questions related to the video

​You will improve your understanding of different forms of radiation and how they are used

​Some isotopes are unstable

​As seen earlier on this means they can decay and change into another isotope or produce alpha, beta or gamma radiation.

​This is known as radiactive decay

​The time is takes for half an unstable isotope to decay is known as a half life

Multiple Choice

An isotope has

• time it takes for half to break down 

• the same protons but differing number of neutrons in the nucleus

• the same electrons but differing number of neutrons in the nucleus

• Time it takes for it to double 

Open Ended

Define the word decay in relation to teeth

​Watch the clip

​Multiple choice questions are to follow in relation to the clip

Multiple Choice

Aplhaparticles can be stopped very easily by

• Lead

• air

• stop sign

• paper

Multiple Choice

Aplha particles are affected by

• Gravity field

• Rain

• magnetic field

• electricity

Multiple Choice

Alpha particles bend right, beta particles....

• bend left

• bend right

• go up

• go down

Multiple Choice

Beta particles have a ________ charge

• positive

• neutral

• negative

Multiple Choice

Gamma radiation can be stopped by

• Aluminium

• oxygen

• lead

• copper

Multiple Choice

Gamma radiation is 

• A type of particle 

• a wave of pure energy

• type of band 

Open Ended

Name two features of Gamma radiation

​Now over to you

​please complete the questions from 5.7 in Science books and email a photo of completion

Multiple Select

Select all the correct answers.

Unstable nuclei have........

• Too many neutrons

• Too many protons

• Too many electrons

• stable amount of everything

Multiple Choice

Unstable nuclei are

• Stable

• have too many electrons

• radioactive

Multiple Choice

Alpha particles form

• nothing

• new element two places below in the periodic table

• new element two places higher in the periodic table

Multiple Choice

When there are too many protons an ______ forms

• electron

• proton

• neutron

• positron

Multiple Choice

True or false the number of neutrons was on the y axis 

• True

• False 

​

• ​​This is a random process and we cannot predict the radiactive nuclei in a sample will decay at any given moment.

  ​However the rate of radioactive decay follows a pattern. As a radiocative sample decays less and less of the original substance is left and the radiactivity drops

  ​This is a half life. When radioactivity reaches one half of its orginal level, one half life has passed

​Now time to put this information into practice

​Following are a selection that you can take your time and select the correct answer.

​

​Please don't rush and you can do this more than once to improve your result

Multiple Choice

What is Half-life?

• The amount of time it takes for some of the nuclei in a sample of the isotope to decay

• The amount of time it takes for half the electrons in a sample of the isotope to decay

• The amount of time it takes for half the nuclei in a sample of the isotope to decay

• the amount of time it takes to double the nuclei in a sample of the isotope to decay

Multiple Choice

If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.

• 1.25mg

• 1.25g

• 10g

• 10mg

Multiple Choice

What is the Half Life of this isotope?

• 3 days

• 5 days

• 8 days

• 10 days

Multiple Choice

How many protons does this isotope of titanium have?

• 48

• 22

• 26

• 70

Multiple Choice

How many neutrons does the isotope of lithium have?

• 8

• 3

• 4

• 5

Multiple Choice

An element is defined by its number of 

• protons

• electrons

• neutrons

• protons + electrons

Multiple Choice

An atom's atomic number is equal to

• The number of protons in the atom's nucleus

• The number of neutrons in the atom's nucleus

• The number of electrons in the atom

• The total of protons + neutrons

Multiple Choice

_______ are atoms with the same number of protons but varying numbers of neutrons.

• ions

• elements

• allotropes

• isotopes