I need the six questions completed please and thank you in advance.

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 mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

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