In general, the EPA does not allow claims like those to be made on the productâs label. fda and cosmetics The primary responsibility of the FDA is to enforce the regulations and requirements of the Food, Drug and Cosmetics Act of 1938, which protects consumers from contaminated or misbranded (mislabeled) products.
Rating Newest Oldest. Best Answer: Krypton has 8 valence electrons. It is a noble gas, meaning it has the maximum number of valence electrons its outer shell can hold.You know because it is in group 8A of the periodic table, therefore it has 8 valence electrons. The group number tells you how many electrons are in the valence shell.:).t is a noble gas, meaning it has the maximum number of valence electrons its outer shell can hold. You know because it is in group 8A of the periodic table, therefore it has 8 valence electrons. The group number tells you how many electrons are in the valence shell. :).
Valence = 4___ The electron configuration of tin is [Kr] 5s2 4d10 5p2. The 5p sublevel is unfilled, so the 5p and 5s sublevels contain the valence electrons. Thus, tin has four valence electrons. Alternatively, tin is a 4A metal, so it must contain four valence electrons. Core = 46___ The core electrons come from the filled 4d sublevel and the krypton core, so there are 46 (10 + 36) core electrons in Sn. This is an example of an atom whose valence electrons are not all of those beyond the noble gas core.