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6 Cards in this Set

  • Front
  • Back

Chemical Reactions

Take place due to the movement of electrons Eg. burning of fossil fuels

Protons

Atomic number


Top number on data sheet


Bottom number on equations/questions



Usually the smaller number

Neutrons

Mass number - atomic number

Electrons

Equals protons in a stable element


Written (-x) in an unstable radioisotope

Mass number

Protons + Neutrons


Bottom number on data sheet


Too number in equations/questions



Usually bigger number

Stable vs unstable

A stable (neutral) atom will have the same number of protons and electons



An unstable atom will have different number of electrons to the protons of its element