Q.1
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
Q.2
What is nuclear fission?
  • Big nucleus splits to small nuclei
  • Small nuclei fuse into a bigger nucleus
  • Stars
  • Making compounds
Q.3
What is a beneficial aspect of nuclear fission?
  • The ability to absorb energy
  • The ability to release tremendous amounts of energy
  • The ability to produce more energy than nuclear fusion
  • There are no beneficial aspects of nuclear fission
Q.4
How many neutrons does uranium-have?
  • 238
  • 92
  • 146
  • 143
Q.5
Atoms of each element have a unique number of __________ .
  • protons
  • electrons
  • neutrons
  • isotopes
Q.6
What makes something radioactive?
  • elements with an atomic number above 81
  • an unstable nucleus
  • contaminated sewage
  • It decays over time
Q.7
What would two different isotopes of an atom have in common?
  • Atomic weight
  • Number of protons
  • Number of neutrons
  • Atomic mass
Q.8
The centre of an atom is called
  • the electron
  • the proton
  • the nucleus
  • the neutron
Q.9
Which isotope of carbon is radioactive?
  • carbon-12
  • carbon-13
  • carbon-14
  • carbon-13 and carbon-14
Q.10
Radioactivity is a nuclear phenomenon
  • True
  • False
Q.11
Which particles make up the nucleus of an atom?
  • protons and neutrons
  • electrons and protons
  • electrons, protons, and neutrons
  • electrons and neutrons
Q.12
Which particles are found in the nucleus of an atom?
  • neutrons and protons only
  • neutrons only
  • protons and electrons only
  • protons, electrons and neutrons
Q.13
Fusion occurs when nuclei
  • split
  • combine
  • mutate
  • gain energy
Q.14
Which particles are negatively charged
  • alpha
  • beta
  • gamma
Q.15
Which is an alpha particle
  • Fast moving electron
  • 4 2 He nuclei
  • fast moving positron
  • EM wave
Q.16
What is the symbol for an alpha particle?
  • 42He
  • 0-1e
  • 0+1 e
  • 10n
Q.17
How are gamma rays different from beta particles?
  • Beta particles cannot penetrate people's skin; gamma rays can
  • Beta particles are extremely dangerous, gamma rays are less so
  • Gamma rays are extremely dangerous; beta particles are less so
  • Beta particles are safe for humans to ingest; gamma rays are not
Q.18
Two isotopes of the same element have
  • the same number of protons but different numbers of neutrons
  • the same number of protons but different numbers of electrons
  • the same number of neutrons but different numbers of protons
  • the same number of electrons but different numbers of protons
Q.19
Gamma radiation has
  • the mass of an electron and a charge of +1
  • the mass of an electron and a charge of -1
  • a mass of 4 AMU and a charge of 2+
  • no mass or charge
Q.20
What stops beta radiation
  • Paper
  • Air
  • Glass
  • Aluminium 3mm or thicker
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