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Radioactivity GCSE

Total questions: 28

Worksheet time: 5hrs 40mins

Name
Class
Date
1.

How many protons are in a boron nucleus?

a)

5

b)

6

c)

11

d)

none of the above

2.
An isotope of an element has the same number of _________, but a different number of _________.
a)
Protons, electrons
b)
Protons, neutrons
c)
Electrons, neutrons
3.
This particle determines what element you have - the elements identity.
a)
electron
b)
proton
c)
neutron
d)
valence shell
4.
Which particles make up the nucleus of an atom?
a)
protons and neutrons
b)
electrons and protons
c)
electrons, protons, and neutrons
d)
electrons and neutrons
5.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
6.

An isotope of an element has the same number of _________, but a different number of _________.

a)

Protons, electrons

b)

Protons, neutrons

c)

Electrons, neutrons

d)

Neutrons, protons

7.

A radioactive nuclide has a ____ stable nucleus than a non-radioactive nucleus of the same element.

a)

more

b)

less

c)

identical

d)

small

8.
_______________ is the process by which unstable atoms emit radiation until they become stable.
a)
Radiation
b)
Chemical Reaction
c)
Radioactive Decay
d)
Isotopes
9.
In order of most to least penetrating radiation we have
a)
Alpha , Beta,  Gamma
b)
Beta , Gamma , Alpha
c)
Gamma, Beta, Alpha
d)
Gamma, Alpha, Beta
10.

What particle is released when an unstable isotope undergoes alpha radiation?

a)

a helium nucleus

b)

an electron

c)

a photon of light

d)

a neutron

11.
What type of radiation is the least penetrating?
a)
alpha
b)
beta
c)
gamma
d)
none of them
12.

What decay product is a high energy electromagnetic wave?

a)

alpha

b)

beta

c)

gamma

d)

none of them

13.
What decay product(s) can be stopped by paper?
a)
alpha
b)
beta
c)
alpha and beta
d)
gamma
e)
all of them
14.
Alpha particles.....
a)
a) are positively charged.
b)
b) consist of two protons and four neutrons.
c)
c) can penetrate any thickness of matter
d)
d) All of the above 
15.

What decay product is an electron?

a)

alpha

b)

beta

c)

gamma

d)

none of them

16.

What type of radiation is the least ionising?

a)

alpha

b)

beta

c)

gamma

d)

none of them

17.
What type of radiation is the most ionising?
a)
alpha
b)
beta
c)
gamma
d)
none of them
18.
Which type of radioactive decay is occurring in this equation? 
a)
Alpha decay
b)
beta decay
c)
gamma decay
d)
positron emission
19.
What type of radiation can be stopped by clothing or a piece of paper?
a)
Alpha radiation
b)
Beta radiation
c)
gamma radiation
20.
Which is NOT a characteristic of gamma radiation?
a)
High energized photon of light
b)
Can be stopped by a sheet of aluminum foil
c)
Is the most harmful type of radiation to humans
d)
Our use of protection is concrete, or several inches of lead
21.
What is Half-life?
a)
The amount of time it takes for some of the nuclei in a sample of the isotope to decay
b)
The amount of time it takes for half the electrons in a sample of the isotope to decay
c)
The amount of time it takes for half the nuclei in a sample of the isotope to decay
d)
the amount of time it takes to double the nuclei in a sample of the isotope to decay
22.
If the half life of a radioactive element is 100yrs, how long would it take for the radioactivity to reduce by one half?
a)
200yrs
b)
100yrs
c)
50yrs
d)
300yrs
23.
When a nucleus undergoes nuclear decay by gamma rays, the atomic number of the element....
a)
remains the same
b)
  decreases by one.
c)
increases by one.
d)
increases by two.
24.
In the symbol 20682Pb what does 206 stand for?
a)
Mass number
b)
Atomic number
c)
Atomic mass
d)
Number of protons
25.
What is the symbol for an alpha particle?
a)
42He
b)
0-1e
c)
0+1 e
d)
10n
26.
Complete the nuclear equation and determine the type of decay that is occurring in this reaction. 
a)
alpha
b)
beta
c)
gamma
d)
none
27.

This is the correct equation for U-238 decay.

a)

true

b)

false

28.

This is the correct equation for the decay of Ra.

a)

true

b)

false

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