An electron is a subatomic particle with a negative electric charge that is equal, but opposite to, the positive charge of a proton.
Guinea (coin) The guinea was a coin of approximately one quarter ounce of gold that was minted in Great Britain between 1663 and 1814. The name came from the Guinea region in West Africa, where much of the gold used to make the coins originated. It was the first English machine-struck gold coin, originally worth one pound sterling, equal to twenty shillings, but rises in the price of gold relative to silver caused the value of the guinea to increase, at times to as high as thirty shillings. From 1717 to 1816,
Hello, David -- There are twelve pence in a shilling, and two shillings in a florin. Australia issued pence, shillings, and florins with the kangaroo and emu from 1910 to 1936.The kangaroo and emu design re-appears, however, on some coins with later dates. This page applies to coins minted between 1910 and 1936.ello, David -- There are twelve pence in a shilling, and two shillings in a florin. Australia issued pence, shillings, and florins with the kangaroo and emu from 1910 to 1936.