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Which element was discovered by Marie and Pierre Curie?
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2. Atoms & Elements
Periodic Table: Representative Elements & Transition Metals
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Which of the following lists correctly identifies the top three most abundant elements in Earth's continental crust?
A
Oxygen, Iron, Calcium
B
Oxygen, Silicon, Aluminum
C
Oxygen, Silicon, Iron
D
Silicon, Aluminum, Iron
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Understand that the problem asks for the top three most abundant elements in Earth's continental crust by weight percentage.
Recall that Earth's continental crust is primarily composed of oxygen, silicon, aluminum, iron, calcium, sodium, potassium, and magnesium, with oxygen being the most abundant element.
Recognize that oxygen is the most abundant element because it forms oxides with many other elements in the crust.
Know that silicon is the second most abundant element, mainly because of the abundance of silicate minerals in the crust.
Identify aluminum as the third most abundant element, as it is a major component of many common minerals such as feldspars.
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