General chemistry Density of pennies from bag #7 using excel

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 is the overall order of reaction for rate = k[no]2[o2]

Compare and contrast refraction of light and sound will give brainliest