https://padlet.com/s580674/bc7yepdhlkr Made with ♥ en-us 2017-12-07 14:48:22 UTC 2025-12-21 13:06:04 UTC hello@padlet.com s580674 https://padlet.com/s580674/bc7yepdhlkr/wish/214136776 oxygen is a color less reactive gas , the chemical element or atomic number 8 and the life -supporting component of the air. oxygen forms about 20 percent of the earths atmosphere , and is the most abondant element in the earths crust , mainly in the form of oxide , slicates , and carbonates ]]> 2017-12-07 14:49:32 UTC https://padlet.com/s580674/bc7yepdhlkr/wish/214136776 s580674 https://padlet.com/s580674/bc7yepdhlkr/wish/214510002 we need oxygen to breathe ]]> 2017-12-08 14:53:43 UTC https://padlet.com/s580674/bc7yepdhlkr/wish/214510002 s580674 https://padlet.com/s580674/bc7yepdhlkr/wish/215019697 Tanks of oxygen are used in medicine to treat people with breathing problems. They are also used as life support for astronauts and scuba divers. ]]> 2017-12-11 14:21:22 UTC https://padlet.com/s580674/bc7yepdhlkr/wish/215019697 s580674 https://padlet.com/s580674/bc7yepdhlkr/wish/215023993 Oxygen has 8 protons and 8 neutrons. ]]> 2017-12-11 14:28:44 UTC https://padlet.com/s580674/bc7yepdhlkr/wish/215023993