'All isotopes of astatine, the heaviest halogen, are this, which is why they have half-lives'
radioactive
HALOGENS: All isotopes of astatine, the heaviest halogen, are this, which is why they have half-lives
All isotopes of astatine, the heaviest halogen, are this, which is why they have half-lives
All isotopes of astatine, the heaviest halogen, are this, which is why they have half-lives
HALOGENS
radioactive
HALOGENS