CHAPTER NINETEEN THE REPRESENTATIVE ELEMENTS: …

THE REPRESENTATIVE ELEMENTS: GROUPS 1A THROUGH 4A For Review 1. Oxygen and silicon are the two most abundant elements in the earth’s crust, oceans, and atmosphere. Oxygen is found in the atmosphere as O 2, in the oceans in H 2 O, and in the earth’s crust primarily in silicate and carbonate minerals. Because oxygen is everywhere, it is ................
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