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Indium (49 In) consists of two primordial nuclides, with the most common (~ 95.7%) nuclide (115 In) being measurably though weakly radioactive. Its spin-forbidden decay has a half-life of 4.41×10 14 years, much longer than the currently accepted age of the Universe. The stable isotope 113 In is only 4.3% of naturally occurring indium.
Later, in 1966, the UK Government decided to include in the Queen's Speech a plan to convert sterling into a decimal currency. [97] As a result of this, on 15 February 1971, the UK decimalised sterling, replacing the shilling and the penny with a single subdivision, the new penny , which was worth 2.4 d .