Vertical columns on the periodic table are called
the elements in each column
for #1 for #2
a. grouping a. similar element names
b. families b. similar properties
c. periods c. similar symbols
d. lines d. similar masses

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.

In which reaction is precipitation occurring?

What is the effect of returning nuclear reactor cooling water back into bodies of water?