Helppp Using the figures to the left, fill in the blank to match the biome pictured with its name.

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?

Which element is the least metallic between cadmium, silver, zinc, or iron?

Who discovered a pattern to the elements in 1869?