What quantity serves as the conversion factor be- tween the mass of a sample and how many moles
the sample contains?

Using the periodic table, complete the table to describe each atom. type in your answers. a ? b? c? d? e? f?

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?

What does the symbol (–hfus) indicate in a phase change?