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→About Beta Minus Particles
: '''Beta particles''' may also be referred to as '''beta radiation''' and is written with the symbol '''<math>β^-</math>'''.
: '''Beta particles''' are a fast moving [[electron]] [[emit]]ted from the [[Atomic Nucleus|nucleus]] of an [[Unstable Isotope|unstable isotope]].
: '''Beta particles''' have a [[mass]] of <math>9.11 \times 10^{-31}</math>kg and a [[Relative Atomic Mass|relative atomic mass]] of 1/1840 (which is so much smaller than a [[nucleon]] that it is usually referred to as 0) : '''Beta particles''' have a [[Electrical Charge|charge]] of <math>1.60 \times 10^{-19}</math>C and [[Relative Atomic Charge|relative charge]] of -1.
: '''Beta particles''' are [[emit]]ted when a [[Atomic Nucleus|nucleus]] is too large or the [[ratio]] of [[neutron]]s to [[proton]]s is too large (too many [[neutron]]s).