Oxygen is naturally made. It is the by-product of photosynthesis which every plant on the planet undergoes.
there are more natural
Something that has been artificially made has been made with man-made products rather than natural products.
natural
Cotton is a natural fiber and not artificially made, so there is no chemical formula.
Diamonds are a natural occurring crystal form of carbon. They can be artificially made.
Polonium is a naturally occurring element that can be found in trace amounts in certain minerals and soils. It can also be artificially produced in nuclear reactors or through the decay of heavier elements.
Protactinium is a natural chemical element; but protactinium can be obtained artificially by nuclear reactions from 232Th.
Protactinium is a natural chemical element; but protactinium can be obtained artificially by nuclear reactions from 232Th.
Naturally occurring as it is a stable element. Synthetic means man made and it would be pointless to make oxygen when there is so much of it floating around in the air or in water even if it could be done.
Fish can be fed fish food or artificially created food. This is different from natural food which is made from natural ingredients.
artificial It is artificially made from a natural substance. The ancients had henna long before it was possible to make chemical dyes.
92 are natural and then another 26 or so that are artificially made such as Uuq or Ununquadium.