Summary of Sales Tax on Shipping in Arizona. Many states are confusing on shipping or even simply donât take into account, making you play guessing games. Arizona, though, is nice and straightforward. If the shipping costs are separately stated on the invoice, you shouldnât have to collect.
Astatine is a semi-metallic chemical element classified among the halogens in the periodic table of elements.Periodic table of the chemical elements is a tabular display of the elements in order of atomic number, in which elements with similar properties are grouped in columns.owever, the halogens also include Astatine (At). Astatine is the rarest naturally occurring element, with less than 30 grams estimated to be contained in the entire Earthâs crust.
All isotopes of astatine are radioactive and decay into other elements. For this reason, the element's properties are difficult to study. What is known is that it has properties similar to those of the other halogensâ fluorine, chlorine, bromine, and iodine. Because it is so rare, it has essentially no uses.statine is far too rare to have any uses. Some research suggests a possible medical use, however. Astatine is similar to the elements above it in Group 17 (VIIA) of the periodic table, especially iodine.