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WorksheetsC/SP6a_g
Total questions: 42
Worksheet time: 42mins
The diagram represents a lithium atom. Particle X is
an electron
a proton
an isotope
a nucleus
A teacher measures the count rate of a radioactive source over three minutes. Here is a graph of her results. The graph shows that
each minute the count rate decreases by 800
every three minutes the count rate decreases by 1400
the half-life is one and a half minutes
the count rate halves every minute
A teacher measures the count rate of a radioactive source over three minutes. At a time of 5 minutes the count rate will be about
0 becquerels
50 becquerels
100 becquerels
150 becquerels
Which row of the table is correct for gamma rays?
A
B
C
D
Dave’s teacher measures the count rate of a radioactive source over a period of time. Here is a graph of the results. When the time is 4 hours the count rate will be about
100 counts per minute
50 counts per minute
25 counts per minute
0 counts per minute
Which row of the table is correct for a beta particle?
A
B
C
D
An isotope has 38 protons and 52 neutrons in the nucleus of one of its atoms.
This is represented by
Mo-99 decays into Tc-99 as shown in the equation. X is
a neutron
an alpha particle
a beta particle
a gamma ray
Yttrium-99 (Y-99) forms this decay series.
A
B
C
D
The graphs show how four radioactive substances decay. Which of these substances has the shortest half-life?
A
B
C
D
The radiation from four radioactive sources is aimed at a sheet of cardboard and a 5 cm thick block of aluminium. John’s teacher uses a detector to discover if any radiation has passed through the materials. Which source emits beta-particles only?
A
B
C
D
Which row of the table is correct?
A
B
C
D
The symbol for a radioactive nucleus is shown. If the radioactive nucleus undergoes beta decay the atomic number of the new nucleus will be
x-1
y+1
y-1
x+1
The symbol for a radioactive nucleus is shown. If the radioactive nucleus undergoes alpha decay the nucleon number of the new nucleus will be
x-2
y-2
x-4
y+1
Name the instrument used to detect radioactivity.
voltmeter
ohmeter
seismograph & microphone
geiger-muller tube & counter
What makes something radioactive?
elements with an atomic number above 81
an unstable nucleus
contaminated sewage
It decays over time
The nucleus of one of the isotopes of nickel is represented by 60Ni28 . Which line correctly identifies a neutral atom of this isotope?
28 protons, 32 neutrons, 28 electrons
28 protons, 32 neutrons, 32 electrons
28 protons, 60 neutrons, 28 electrons
60 protons, 28 neutrons, 28 electrons
Select the option that correctly identifies the composition of a 235U-92 ion
92 protons, 143 neutrons, 92 electrons
92 protons, 143 neutrons, 92 electrons
92 protons, 235 neutrons, 91 electrons
92 protons, 143 neutrons, 91 electrons
The diagrams show the paths of particles passing near a positive nucleus.
Which diagram shows the path of a neutron?
In the Rutherford scattering experiment most α particles passed through the foil undeflected. What is a correct deduction from this result?
Most of the mass of an atom is within the nucleus.
The diameter of the nucleus is much less than the diameter of the atom.
The nucleus has a positive charge.
The charge of the atom is neutral.
Most of the alpha particles went straight through the gold foil in Rutherford's experiment. This suggested that....
There is no interference between alpha and gold.
Most of the atom is made up of empty space.
The alpha particles were very tiny.
None of the above
Some of the alpha particles fired at the gold foil (in Rutherford's experiment) were deflected at angles. This was due to...
Reflection of the alpha source when it it the fluorescent screen.
The alpha particles hitting the gold nucleus.
Repulsion forces between the positively charged nucleus and the positively charged alpha particles.
A mis-firing of the alpha source
What did Thomson's plum pudding model suggest about the structure of atoms?
That neutrons and electrons were arranged in a sphere.
That an atom was a sphere of positive charge throughout which the electrons were distributed
That an atom was filled with neutrons, protons and a sphere of negative charge.
That neutrons, protons and electrons were distributed throughout a sphere.
Rutherford’s gold foil scattering experiment indicated that
the nucleus of an atom occupies most of an atom’s volume
positive charges are dispersed throughout the atom.
positive charges are concentrated in a very small core at the atom’s centre
protons and neutrons are located in the nucleus.
How does the Bohr model explain the different coloured flames of burning chemicals?
Electrons are in specific energy levels
Protons and neutrons are in a nucleus
Electrons orbit a nucleus
Electrons are in a 'soup' of positive charge
Who proposed the following model for the atom?
"Atoms are solid spheres. Each element is made of a different type of atom."
Bohr
Chadwick
Dalton
Rutherford
After Radon, which of these is the biggest source of background radiation?
Buildings and ground
Nuclear power stations
Water
The sun
The diagram shows four electron energy levels in an atom. When an electron moves from level 3 to level 1 visible light is emitted. Which transition might cause ultraviolet light to be emitted?
from level 2 to level 1
from level 4 to level 1
from level 3 to level 2
from level 4 to level 2
The typical size of an atom is
10–5 m
10–10 m
10–15 m
10–20 m
