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Worksheets7.1 Radioactivity
Total questions: 20
Worksheet time: 2hrs 39mins
In the equation, 146C --> 147N + 0-1B, the _______ decay of radioactive carbon-14 results in the creation of a new nitrogen-14 atom.
Gamma
Beta
Alpha
23892U-->23490Th + 42He + 200
85209At = ___ + 24He
Solve this equation for beta decay.
614C = ___ + -10e
410Be
714N
210He
613C
The nucleus is held together by the ___________________________force.
The Strong Nuclear Force
The Weak Nuclear Force
Electromagnetism
Gravity
What does the graph show is needed to keep the nucleus stable?
As protons increases, more neutrons are needed.
As protons increases, less neutrons are needed.
As neutrons increase, less protons are needed.
What is likely to happen to unstable nuclei with too many, or too few, neutrons?
They will decay by emitting radiation.
They will loose all their electrons.
They will bond with other atoms.
What will happen if the nucleus has too many neutrons?
A neutron will turn into a proton and emit a fast-moving electron.
A proton will turn into a neutron and emit a fast-moving electron.
A neutron will break into two and emit a fast-moving alpha particle.
What observation suggests the atom is mostly empty space?
Most alpha particle travel straight through.
Some alpha particles are deflected at small angles.
Occasionally an alpha particle come straight back.
What type of radiation is the most penetrating?
Alpha
Beta
Gamma
Find the Half life - Type the value only
(a)
The % of the parent isotope remaining after 2 Half Lives.
50%
25%
12.5%
6.25%
The diagram shows 32 atoms
8 of the Red are parent isotopes
24 of the Green are daughter isotopes
How many half-lives have occurred?
0
1
2
3
What is the Half Life of this isotope?
3 days
5 days
8 days
10 days
What is an isotope
An atom with the same number of neutrons different number of protons
An atom that has lost or gained an electron
An atom with the same number of protons, different number of neutrons
An atom with the same number of electrons and different neutrons
Use the Graph to find the decay constant (Lambda)
Give you answer as a decimal without units - 2 SF only
(a)
What radiation is produce at 1?
(a)
What radiation is produce at 2?
(a)
