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 shell electron pair repulsion, VSEPR, is a super-simple technique for predicting the geometry of atomic centres in small molecules and molecular ions:Carbon in methane, CH4 Nitrogen in ammonia, NH3 Xenon in xenon tetrafluoride, XeF4 Iodine in the iodide difluoride ion, [IF2].otal coordination number = number of electron pairs = number of electrons in outer shell divided by 2. Methane, CH4, ammonia, NH3, the ammonium ion, [NH4]+ and the nitranion (amide ion), [NH2], [above] all have eight electrons in the valence shell of the central atom and all have a total coordination number of 4.