Astatine is found naturally as a member of the radioactive decay series: uranium, thorium and actinium series; the chemical form is not excatly known.
Astatine exist in nature very probable as compounds.
no, it is most commonly found as a compound
astatine, element 85
pure element
Sodium
Astatine is an extremely rare chemical element, not found in common materials.
Astatine is found less than 28 grams in the earth crust
It is found in nature in its pure form (not as a compound).
mineral
Calcium is never found in its elemental form in nature.
Yes they are since they are pure chemical substances found in nature.
inorganic chemistry