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What element is the most abundant element in earth's crust?

10 Answers
hi mybestanswer members i have a question about: what element is the most abundant element in earth's crust?, please answer me this question
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Abundance can be interpreted in two different ways, mass or quantity, which is like saying that a six pack of beers is more beers than a keg of beer because it is divided into more portions. When we know that a keg even though it is only one portion has a much larger mass. If you compare say two Hydrogen atoms to one Bromine atom the mass of the bromine will be greater than both the hydrogen atoms put together in addition the Bromine atom will be much larger given that it has more electron orbitals filled. So one could argue that because it has a greater mass and takes up more space in this case one Bromine atom has a greater abundance than two Hydrogen atoms. Like a keg has a greater mass abundance than a six pack.

The answer is variable if you uphold this relative perspective.

Oxygen has atomic mass 15.9994 while 46.71% of the lithosphere is Oxygen
Silicon has atomic mass 28.0855 while 27.69% of the lithosphere is Silicon

So according to quantity percentage abundance Oxygen is greater, However if you multiply the atomic mass by the quantity percentage abundance you get the mass abundance

Oxygen, atomic mass 15.9994 multiplied by 46.71% = 747.33 mass abundance/ 100
Silicon, atomic mass 28.0855 multiplied by 27.69% = 777.69 mass abundance/ 100

So according to mass abundance Silicon is greater

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Oxygen is the most abundant element in the earth's crust. It is the most abundant element by mass in the earth's crust. Oxygen constitutes almost half the mass of the earth's crust. It is present in the form of its most common compounds in the earth's crust - oxides. The earth's crust contains many oxides, the most abundant of which are Silicon Oxide (SiOI2), Aluminum Oxide (Al2O3), Calcium Oxide (CaO), Magnesium Oxide (MgO), Sodium Oxide (Na2O), Iron Oxide (FeO), Potassium Oxide (K2O), Titanium Oxide (TiO2), Phosphorous Oxide (P2O5).

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Oxygen is the commonest element in the Earth's crust - it makes up 46.55% of the crust. Silicon makes up about 27%. Aluminium, calcium and magnesium are some other common elements, however oxygen forms compounds with all of these and a lot of oxygen is locked up in the crust in the form of silicates (combined with silicon, as in quartz, and often also with other elements, such as aluminium silicates) and combined with carbon as carbonates (for example calcium carbonate, of which chalk, limestone and marble consist).

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C

It's oxygen. Most compounds in the Earth's crust are oxides and contain oxygen, including silicates which is why silicon is the second most common element, carbonates, metal ores etc. Silicates (minerals mostly consisting of silicon and oxygen) are most common mineral in Earth's crust, which is why silicon is 2nd most common element.
This table shows abundance of many elements in Eath's crust:
http://en.wikipedia.org/wiki/Abundance_of_elements_in_Earth%27s_crust

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F

I am sure it is Silicon. I have watched a documentary about Integrated Circuits fabrication which tells that Silicon is the most abundant element in the earth's crust.

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C

Oxygen is the most abundant element in earth's crust; it makes up 46.6% of the earth's mass.

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Silicon by mass abundance, and Oxygen by quantity percentage abundance

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F

I think Sillicon (Si) is the most in earth crust.

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Silicon

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Carbon

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