The most abundant elements in earth's crust are _.
Correct answer: C. Si & Al
- A. B & Al
- B. Ca & Mg
- C. Si & Al
- D. All
Explanation
The nine most common elements in the Earth's crust are roughly 46% oxygen, 28% silicon, 8.3% aluminium, 6.9% iron, 2.4% calcium, 2.5% sodium, 2.4% magnesium, 2% potassium, and 0.61% titanium. Silicon and Aluminum are the two most abundant elements in the Earth's crust. Silicon is the most abundant element overall, making up about 28% of the Earth's crust by mass, while Aluminum is the third most abundant element, constituting around 8% of the crust.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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