Physics paper 1
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what is the radius of an atom?
1 x 10^-10
how could the energy levels of electrons change?
when the atoms absorbs or emits EM radiation.
what does absorbing electromagnetic radiation do to an electron
moves it to a higher energy level further from the nucleus
why would an atom emit EM radiation
electrons drop to a lower energy level
structure of an alpha radiation
two neutrons and two protons same as a helium nucleus
structure of beta radiation
high speed electron ejected from the nucleus as a neutron turns into a proton.
structure of gamma radiation
electromagnetic radiation it is a wave
difference between irradiation and contamination
irradiation is exposure to radiation while unwanted radioactive atoms getting on an object is contamination.
two methods of energy transfer
mechanically and electrically