What characteristic shared between chlorine, fluorine, and bromine makes them have similar properties?

a. all have seven valence electrons.
b. all have the same number of protons in their outermost energy levels.
c. all have two electrons in their first energy levels.
d. all have a similar state of matter.

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

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.

Determine the reaction and balance the following equations urgent due in the morning