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From nuclear fusion of stars. The fusion process starts with hydrogen molecules being pulled together by gravity, proceed to form helium when a critical temperature is reached at about 2.5x10^9 oC, then form heavier atoms such as magnesium, oxygen and calcium.
The nucleosynthesis then follows a complex path through Si - Ca - Ti - Fe - Ni - Co- and finally Fe56 which is stable.
With the formation of sufficient heavy elements, the star gains greater density eventually leading to a dwarf star or a supernova, depending on the size of the starting star. [Our Sun is too small to make iron, so we will not go nova that way!]
About 5% of meteorites are of the iron-nickel type, easily recognized by a characteristic crystal pattern revealed by etching.
The core of the Earth is rich in nickel-iron, and it is possible that the break-up of an early planet that gave us the meteor belt, and the iron.
[In early Earth, the oceans were very rich in dissolved iron, and it was the arrival of the algae and photosynthesis that precipitated it out (due to the production of oxygen) as the immense banded-iron beds, which are the source of the major commercial iron deposits today.]
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Are iron filings a mixture?
Iron filings may be pure elemental iron, it depends on the source of the iron.
How is iron usually separated from its ores?
By heating iron ore and a source of Carbon
Why does iron weigh more after it rusts?
because the iron bonds with oxygen, so the weight becomes the original weight of iron plus the original weight of Oxygen.
What is the original source of coal?
its usually from algae!
What is the original source of oil and coal?
Vegetable matter and algae
What is a source of iron?
A good source of iron is red meat. If you are deficient, you may be prescribed iron pills to take daily.
What is the original source of hydroelectricity?
The original source of energy for hydroelectricity is water.
Is hematite a source of iron?
The main raw material for iron-making is iron ore.There are two iron ore minerals:haematite and magnetite.Actually haematite is an ore where iron is extracted.One can say that haematite is a source if iron.
What is the original source of energy for hydroelectricity?
The original source of energy for hydroelectricity is water.
What is in a primary source?
Original letters or documents, for example. A secondary source would be an essay, for example, about the original source.
Are iron filings a mixture?
Iron filings may be pure elemental iron, it depends on the source of the iron.
What is the original source of hydroelectric energy?
The original source of energy for hydroelectricity is water.
What would represent a source of possible iron contamination?
an iron chelate
Milk is a poor source of?
IRON
Is magnetite a source of tin?
No, but it's a big-time source of iron.
What is the original source of energy in firewood?
The original source of the energy in any combustible plant material is from the sun.
What is a good food source of protein and iron?
Meat is a good source of both protein and iron. Liver is an even richer source. Other sources includelentils, lima beans, kidney beans, black beans, chickpeas, and soybeans. Raisins are also a high source of iron.
