30 Most Common Elements by 0scar https://padlet.com/3015721/jet95r0cv6x6 Made with charm en-us 2017-04-25 19:11:59 UTC 2017-04-25 19:17:39 UTC hello@padlet.com H - Hydrogen - Atomic Number 1 3015721 https://padlet.com/3015721/jet95r0cv6x6/wish/168215733 Hydrogen is present in all organic compounds. ]]> 2017-04-25 19:16:12 UTC https://padlet.com/3015721/jet95r0cv6x6/wish/168215733