Which element has the same number of valence electrons as bromine (Br)? A. Astatine (At)
B. Krypton (Kr)
C. selenium (Se)
D. ytterbium (Yb)

Which substance absorbs 58.16 kj of energy when 3.11 mol vaporizes? a)ch4 b)h2s c)co2 d)nacl

Both josef loschmidt and amedeo avogadro contributed to our understanding of basic molecular numbers, sizes, and reaction ratios. neither scientist discovered “avogadro’s number” in the form we use it today (6.02 x 10 23). still, there’s a controversy over the name. research the contributions from these two scientists and read about how avogadro’s number got its name. briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in naming the number.

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.