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,
(July 2012). In Canada, a penny is a coin worth one cent, or 1â100 of a dollar. According to the Royal Canadian Mint, the official national term of the coin is the one-cent piece, but in practice the terms penny and cent predominate. Originally, penny referred to a two-cent coin.roduction of the penny ceased in May 2012, and the Royal Canadian Mint ceased the distribution of them as of February 4, 2013. However, like all discontinued currency in the Canadian monetary system, the coin remains legal tender.