Atomic physics Year 11
Authored by Runar Salimullin
Physics
8th - 9th Grade
Used 2+ times
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12 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The scattering of α-particles by a thin metal foil supports the nuclear model of an atom.
Why are α-particles used rather than neutrons?
because they always travel more slowly
because they are heavier
because they are larger in diameter
because they have a positive charge
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A nucleus of a radioactive substance undergoes an α-decay followed by a β-decay.
What are the nucleon (mass) number (A) and proton (atomic) number (Z) of the nuclide formed after both decays have happened?
A=214, Z=85
A=216, Z=85
A=214, Z=83
A=216, Z=83
3.
FILL IN THE BLANKS QUESTION
2 mins • 1 pt
Fig. 12.1 shows a decay curve for polonium-210.
Use the graph to determine the half-life of polonium-210.
half-life = (a) weeks
4.
FILL IN THE BLANKS QUESTION
2 mins • 1 pt
The half-life of carbon-14 is 5800 years.
A piece of wood contained 20 000 carbon-14 atoms when it was buried in a landslide.
Calculate the number of years it takes until the number of carbon-14 atoms in the wood is 2500.
(a)
5.
OPEN ENDED QUESTION
3 mins • Ungraded
(a) Fig. 12.1 represents an atom of carbon.
(i) State the name of particle X.
(ii) State the name of particle Y.
(b) Carbon-14 is unstable. It decays by beta emission to form nitrogen.
Complete the equation for this decay.
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6.
OPEN ENDED QUESTION
3 mins • Ungraded
Describe how an electric field between two charged plates could be used to determine whether a beam of particles consists of α- or β-particles.
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7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Below are four statements about isotopes of a certain element.
Which statement about the isotopes must be correct?
They are radioactive.
They are unstable.
They have the same number of neutrons.
They have the same number of protons.
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