People increase erosion in forested areas by

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?

Particles vibrate in a rigid structure and do not move relative to their neighbors.

What was bohr’s contribution to the planetary model