15mg of Bismuth-213, with a half-life of 46 minutes, are administered to a cancer patient in Targeted Alpha Therapy (TAT). How much Bismuth-213 remains 6 hours later?

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

Acetylene gas c2h2 undergoes combustion to produce carbon dioxide and water vapor how many grams of water are produced by the same amount of c2h2?