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,
Silver coins There was a three-penny bit (pronounced âthripennyâ), a six-pence, a shilling, a florin (worth 2 shillings), a half-crown (worth 2 shillings and six pence) and a crown (worth 5 shillings).There were 12 pence to the shilling and twenty shillings made a pound,Gold coins There was the sovereign valued at a pound, and the half-sovereign. Notes After 1844 all bank notes were issued by the Bank of England, to the value of Â£5, Â£10, Â£20, Â£100, Â£200, Â£500 and Â£1,000.Guinea There was also a unit of currency known as the guinea, for which there was no coin or note (how very British!) and it was worth one pound and one shilling.here were 12 pence to the shilling and twenty shillings made a pound, Gold coins There was the sovereign valued at a pound, and the half-sovereign. Notes After 1844 all bank notes were issued by the Bank of England, to the value of Â£5, Â£10, Â£20, Â£100, Â£200, Â£500 and Â£1,000.