no, it is most commonly found as a compound
hydrogen is most commonly found as a part of water with oxygen.
Iodine is the element most similar to astatine. Both elements are in the halogen group on the periodic table, sharing similar chemical properties due to their valence electron configuration. Astatine is a rare and highly radioactive element, making it difficult to study in detail.
In the Earth's atmosphere.
Oxygen, hydrogen, halogens
The most probable formula for the astatine ion is At-. Astatine commonly forms anions by gaining an extra electron to achieve a stable electron configuration.
Oxygen, hydrogen, halogens
Polonium doesn't contain another element.
Polonium doesn't contain another element.
Very probable this element is oxygen.
I think it is hydrogen
Because it's the most simple.
Roentgenium is an artificial chemical element.