. Which one is NOT an INDICATOR that a chemical has occurred A) Gas is produced
B) Precipitate is produced
C) Change in energy
D) Change in mass

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

What does the cell nucleus do or, how does it function?

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?