TEST 2026 QUESTIONS AND ANSWERS
GRADED A+
◉Alpha Decay. Answer: Occurs in nuclei of 82 protons or more that
consists of an alpha particle being emitted
◉Photons. Answer: Virtual particles that are discrete packets of
energy
◉Antiparticle. Answer: Opposite in charge to the particle but have
the same rest mass and rest energy
◉PET Scan. Answer: Positron Emission Tomography
◉Rest Energy. Answer: The amount of energy that would be
produced if all of a particle's mass was transformed into energy
◉Fundamental Particle. Answer: A particle that cannot be split up
into smaller particles
, ◉Stopping Potential. Answer: The work done by the potential
difference in stopping the fastest moving electrons
◉Electron Volt. Answer: The kinetic energy that an electron has
after being accelerated from rest through a potential difference of 1
volt
◉1 eV =. Answer: 1.6x10^-19 Joules
◉Ground State. Answer: The lowest energy level that an electron
can occupy in an atom (n=1)
◉Excitation. Answer: When an electron gains the exact amount of
energy needed to move up to a higher energy level in an atom
◉Ionisation. Answer: The process when an electron gains enough
energy from a photon to leave the ground state of the atom that it's
in
◉Ionisation Energy. Answer: The amount of energy needed to
remove an electron from the ground state of an atom
◉Radian. Answer: The angle that is equal to the arc length divided
by the radius of the circle 2pi radians = 360 degrees