Compare, em termos de ordem de grandezas ,a fração de água aproveitável (os lagos ,os rios e as subterrâneas)pelo ser humano com as frações dos demais corpos de água os oceanos mares geleiras e as calotas polares do planeta ​

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 number of atoms in 3.54 mol s

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?