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Created page with "==Key Stage 4== ===Meaning=== A '''stable isotope''' is an isotope which has a long half life compared to other isotopes. ===About Stable Isotopes=== :..."
==Key Stage 4==
===Meaning===
A '''stable isotope''' is an [[isotope]] which has a long [[Half Life|half life]] compared to other [[isotope]]s.
===About Stable Isotopes===
: '''Stable isotopes''' do not [[Radioactive Decay|decay]] to [[emit]] [[Ionising Radiation|ionising radiation]].
: The '''stability''' of an [[isotope]] is a relative term. Two [[isotope]]s may both be [[Unstable Isotope|unstable]] but one may be more '''stable''' than another.
: The '''stability''' of an [[isotope]] depends on the [[ratio]] of [[proton]]s to [[neutron]]s in the [[Atomic Nucleus|nucleus]]. For small [[Atomic Nucleus|nuclei]] the [[ratio]] of [[proton]]s to [[neutron]]s is usually 1:1. For large [[Atomic Nucleus|nuclei]] a greater number of [[neutron]]s than [[proton]]s are needed for the [[isotope]] to be '''stable'''.
===Meaning===
A '''stable isotope''' is an [[isotope]] which has a long [[Half Life|half life]] compared to other [[isotope]]s.
===About Stable Isotopes===
: '''Stable isotopes''' do not [[Radioactive Decay|decay]] to [[emit]] [[Ionising Radiation|ionising radiation]].
: The '''stability''' of an [[isotope]] is a relative term. Two [[isotope]]s may both be [[Unstable Isotope|unstable]] but one may be more '''stable''' than another.
: The '''stability''' of an [[isotope]] depends on the [[ratio]] of [[proton]]s to [[neutron]]s in the [[Atomic Nucleus|nucleus]]. For small [[Atomic Nucleus|nuclei]] the [[ratio]] of [[proton]]s to [[neutron]]s is usually 1:1. For large [[Atomic Nucleus|nuclei]] a greater number of [[neutron]]s than [[proton]]s are needed for the [[isotope]] to be '''stable'''.