WorksheetsG10 Nuclear atom
Total questions: 29
Worksheet time: 2hrs 25mins
What particle was used in the gold foil experiment?
Beta Particle
Alpha particle
Gamma ray
High energy electron
Most of the alpha particles went straight through the gold foil. 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.
quantum tunneling exists
the nucleus is positively charged
Some of the alpha particles fired at the gold foil 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
most of the atom is made up of space
which two particles are oppositely charged
electron
neutron
proton
anti-neutrino
neutrino
which two subatomic particles have approximately the same mass?
proton
neutron
electron
neutrino
A nucleus of sodium, Na, has 11 protons and 12 neutrons. Which symbol represents this nucleus?
How many protons are in the nucleus of an atom of radium
88
138
226
314
A nucleus of the element cobalt may be represented by the symbol in the picture. What is the structure of this nucleus?
27 protons and 32 neutrons
27 protons and 59 neutrons
59 protons and 27 neutrons
59 protons and 32 neutrons
A narrow beam of alpha-particles is fired at a thin piece of gold foil. Which is the final direction of the largest number of alpha-particles?
A
B
C
D
The proton number (atomic number) Z is
number of neutrons
number of neutrons and protons
number of electrons
number of protons
The nucleon number (mass number) A is
number of neutrons
number of neutrons and protons
number of electrons
number of protons
An atomic nucleus with a particular value of A and Z is called
neutron
nucleus
nuclide
Nuclides with the same proton numbers but different nucleon numbers are called
isolation
isotope
iso iso
Nuclear fission is a nuclear reaction that releases energy by splitting large atoms into smaller ones.
True
False
Examples of nuclear fuels are...
Uranium
Neptunium
Plutonium
Mercury
What particles are fired at atoms to make them split?
(a)
The new, smaller nuclei are called (a) nuclei.
Approximately (a) neutrons are released with each fission reaction.
The extra neutrons that are released cause further nuclear fission reactions to happen. These then release even more neutrons and the process repeats. This is called a (a) reaction.
Explain why the neutrons released in nuclear fission must be slow-moving in order to cause a chain reaction.
A moderator, such as graphite, is used to...
stop a nuclear reaction happening
speed up neutrons
slow down neutrons
absorb radiation from the reaction
To slow down a nuclear fission reaction, the control rods are...
raised
lowered
Control rods are often made from (a) .
Define nuclear fusion.
Nuclear fusion – combining lighter atoms to make heavier ones – is what makes it possible.
Nuclear fusion – splitting lighter atoms to make heavier ones – is what makes it possible.
Nuclear fusion – combining heavier atoms to make lighter ones – is what makes it possible.
Nuclear fusion – splitting heavier atoms to make lighter ones – is what makes it possible.
Which of the following reactions would yield the largest amount of energy per mole of fuel?
92235U + 01n → 56141Ba + 3692Kr + 301n
CH4 + 2O2 → H2O + CO2
92238U → 90234Th + 24He2+
94238Pu → 92234U + 24He2+
