Comments
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Beryllium 20th February
bu11et: actually tennisine is assumed to be the heaviest halogen so far -
bu11et 12th Feb 2022
Astatine is a highly radioactive element and it is the heaviest known halogen. ... All that is known about the element has been estimated from knowing its position in the periodic table below iodine and by studying its chemistry in extreme diluted solutions. +1 -
YCY 21st Jan 2022
Not Astaine but high quallity for me. +1