Properties of oxygen (2 qualitative and 2 quantitative)
The occurrence of oxygen (where found? in what form? in what amount?)
two importance's of the element (could include uses)
thanks
Oxygen
2009-03-20 1:32 pm
回答 (1)
2009-03-20 1:43 pm
✔ 最佳答案
Oxygen consists of 2 oxygen atom in generalOxygen can find in normal air as O2 or as ozone which you probably heard as the ozone layer in the atmosphere as O3
2 importances of oxygen is that
first of all O2 is needed for every living thing
2nd O3 in the ozone protect us from the UVC lights and reduce the amount of UVA and UVB light
參考: ME
收錄日期: 2021-04-28 23:58:16
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