Elements & Compounds

Elements & Compounds

1. Elements

   • Can't be broken down into anything more simple
   • When more than one combine it creates a compound
   • Have symbols of one or two letters the first letter is a capital letter and the second is lower case so chlorine is Cl
   • Can be put into the periodic table
     • All of them are metal except from 1,2,5,6,7,8,9,10,14,15,16,17,18,33,34,35,36,52,53,54,85,86 and 118
       • Or you can find Boron and go diagonally down and right and everything to the right of that line is a non-metal
   • 57-70 and 89-102 are all radioactive
   • All of the letters that are given to elements either come from the Latin name or the English name for it
     • So Iron is Fe for Ferrum and Gold is Au for Aurum
   • About three quarters of them are metals

2. Compounds

   • More than one element after a chemical reaction creates a compound
     • So if you have a mixture of oxygen and hydrogen in a container and you heat it then a chemical reaction will take place and the product will be water
   • Even though there are only a few more than 100 elements there a millions of compounds
   • You name compounds if it is made of a metal and a non-metal by putting the metal first and the non-metal second
   • If at the start of the second word there is mono, di or tri that tells you how many particles of that element there are so there are two compound gases that have carbon and oxygen, carbon dioxide so there are two oxygen particles to one carbon particle and there is also carbon monoxide which has one oxygen particle to one carbon particle. Carbon monoxide is poisonous
     • • Carbon Dioxide
     • • Carbon Monoxide

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