The atomic mass can be smaller than the atomic number

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?

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles

How can one make a supersaturated solution? (apex)