How many resonance structures does nh3 have?
i believe that there are none, but i would like some

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

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?

Why is permeable soil best for plants that need a lot of drainage?