I need some help with chemistry. Let me know if you are good at it!

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 percent by mass of oxygen in fe2o3

What methods could you use to solubilize calcium carbonate