What is true about the elements of a period? they have the same number of electron shells. they have similar chemical characteristics. they have similar physical characteristics. they transition from a metal to nonmetal to inert gas from left to right.

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.

Jose and eric were given four samples in lab. the results of their analysis are shown in the table. based on the data they collected, which sample is most likely a metal?

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?