1 does not have to order a complete bitcoin as bitcoins is usually divided into little units referred to as satoshis, named after the creator. A satoshi is reminiscent of 0.00000001 bitcoin. A transaction is a transfer of benefit concerning Bitcoin wallets that will get included in the block chain. https://jaredizobo.elbloglibre.com/30955229/bitcoin-things-to-know-before-you-buy