Which compositional layer of earth is the thinnest ? ? a. the crust b. the mantle c. the inner core d. the outer core

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?

Determine the reaction and balance the following equations urgent due in the morning

How are the terms group and period used on the periodic table