What’s earth atmosphere contains the element oxygen into different forms. The chemical formula for oxygen gas is O2 the Chemical formula for Ozone gas is O3 how do the structure of oxygen gas differ from that ozone?

frequency or wavelenth of em radiation in a vacuum

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.