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WorksheetsAtomic Structure and Radioactive Decay
Total questions: 24
Worksheet time: 12mins
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
85209At = ___ + 24He
146C --> 0-1e + ________
85209At = ___ + 24He
Gamma rays have
no mass
a huge mass
a small mass
an average mass
An isotope that undergoes B- decay has
too few protons
too many protons
too few neutrons
Too many neutrons
What two subatomic particles are found in an atom's nucleus?
Protons and neutrons
neutrons and electrons
electrons and protons
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.
Alpha decay causes the mass number of the nucleus to decrease by ________ and the atomic number of the nucleus to decrease by _______.
four, two
two, four
one, two
two, three
Which symbol(s) represent an beta particle?
yellow
blue
red
Which symbol(s) represent gamma radiation?
yellow
blue
red
If the nucleus has too many neutrons, a neutron will turn into a proton and emit a fast-moving electron. This process is known as ___________.
alpha radiation
beta radiation
gamma radiation
neutron radiation
Beta radiation is ____________________
an electron from an electron shell.
an electron from the nucleus.
two protons and two neutrons.
a high frequency electromagnetic wave.
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.
Which form of radioactive decay is the most ionising?
Alpha
Beta
Gamma
What type of radiation is the most penetrating?
Alpha
Beta
Gamma
