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The two most abundant elements in Earth's continental crust are _____. oxygen and silicon Which major non-silicate rock forming mineral is the primary constituent of the rock limestone? calcite Which of the following is the least abundant of the eight rock forming elements that make up most of the continental crust? iron; oxygen; aluminum; calcium; magnesium
Tin is the 49th most abundant element and has, with 10 stable isotopes, the largest number of stable isotopes in the periodic table. It is a silvery, malleable other metal that is not easily oxidized in air, obtained chiefly from the mineral cassiterite where it occurs as tin dioxide, SnO 2.