Determine the particle that balances the equation. drag the appropriate items to their respective bins. view available hint(s) reset help 0 −1 β 38 19 k → 38 18 ar+x 4 2 α 218 84 po → 218 85 at+x 0 +1 β 210 83 bi → 206 81 tl+x 1 0 n 1 0 n → 0 −1 β+x