Calcium chloride can be represented by the chemical formula of?

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

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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?