Which one is not a sedimentery rock a.)sandstone b.)limestone c.)quartz d.(coal

C. Quartz

- Chemical Sedimentary Rocks, Such As Rock Salt, Iron Ore, Chert, Flint, Some Dolomites, And Some Limestones, Form When Dissolved Materials Precipitate From Solution.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.