What element is this

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 compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.