Potassium
Potassium is the element found as part of a compound in bananas. When burned, it produces a violet flame due to its characteristic emission spectrum.
hydrogen is most commonly found as a part of water with oxygen.
Very probable this element is oxygen.
Very probable this element is oxygen.
Oxygen, hydrogen, halogens
The chemistry of polonium is not known in details but I suppose that this element is oxygen.
No, iron is an element. Chrmium is also an element, so there are no other substances, compounds or otherwise, that are found in it. However, there are alloys that contain both iron and chromium along with other metals.
An element is a part of a compound.
The element my be rare because it is part of a compound and cannot be found as an element as itself in nature. The only way to get the element is to extract it from the compound. That may not be very easy.
Argon gas is an element. It will be element only. It can be part of some mixture. But never ever be a part of the compound. It is a noble gas.
Argon gas is an element. It will be element only. It can be part of some mixture. But never ever be a part of the compound. It is a noble gas.
Helium is a noble gas and is not typically found as part of a compound. It is most commonly found as a standalone element due to its stable configuration with a full outer electron shell.