Hydrogen, it only has one electron and therefore can bond with almost every element
(with the exception of the nobel gasses, they already have a full outer electron shell)
Oxygen is the most commonly found element as part of a compound with another element. This is because oxygen has a high electronegativity and readily forms chemical bonds with other elements. Additionally, oxygen is abundant in the Earth's atmosphere, making it readily available for chemical reactions.
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.
Yes, gold is an element.Yes It is-see AU on table
Sodium
Sodium is a compound.
it's an element!
no, it is most commonly found as a compound
Sodium
hydrogen is most commonly found as a part of water with oxygen.
Oxygen, hydrogen, halogens
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.
Polonium doesn't contain another element.
Polonium doesn't contain another element.
Although Hydrogen is the most abundant element in the universe, it is only found in trace amounts on Earth. However, one of it's compounds fills around 70% of the world's surface: Water: H2O: Hydrogen Oxide.
Oxide is the name of oxygen when it is found in a compound with another element :)