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The abundance of antimony in the Earth's crust is estimated at 0. 2 to 0. 5 parts per million, comparable to thallium at 0. 5 parts per million and silver at 0. 07 ppm.
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abundance and Earth's
The abundance of elements in Earth's crust differs from those in the universe ( and also the Sun and heavy planets like Jupiter ) mainly in selective loss of the very lightest elements ( hydrogen and helium ) and also volatile neon, carbon, nitrogen and sulfur, as a result of solar heating in the early formation of the solar system.
Their awareness of the Earth's surface and abundance of practical skills provided colonisers with a knowledge that, in turn, created power.
The natural abundance of hydrogen ( H < sub > 2 </ sub >) in the Earth's atmosphere is only on the order of parts per million, but H < sub > 2 </ sub > is, in fact, the most abundant diatomic molecule in nature.
Germanium ranks near fiftieth in relative abundance of the elements in the Earth's crust.
Its estimated abundance in the Earth's crust is 1. 3 mg / kg.
The diversity and abundance of mineral species is controlled by the Earth's chemistry.
Atomic mass for natural life is based on weighted average abundance of natural isotopes that occur in the Earth's crust and atmosphere.
The abundance of ytterbium in the Earth's crust is about 3 mg / kg.
There is little evidence of coevolution driving large-scale changes in Earth's history, since abiotic factors such as mass extinction and expansion into ecospace seem to guide the shifts in the abundance of major groups.
Because of their strong affinity for oxygen, most lithophile elements are enriched in the Earth's crust relative to their abundance in the solar system.
Iridium is the rarest transition metal occurring within the Earth's crust, with an abundance by mass of less than one part per billion.
Although no chalcophile element is of high abundance in the Earth's crust, chalcophile elements constitute the bulk of commercially important metals.
This is an attractive hypothesis because of the abundance of CH < sub > 4 </ sub > ( methane ) and NH < sub > 3 </ sub > ( ammonia ) present in hydrothermal vent regions, a condition that was not provided by the Earth's primitive atmosphere.
The Broad Survey would have looked at approximately 1, 500 stars to help determine the abundance of Neptune-mass and larger planets around all star-types in Earth's sector of the Milky Way.
Earth's surface was probably broken up into many small plates with volcanic islands and arcs in great abundance.
The Ymir begins to grow at a prodigious rate due to the abundance of oxygen in Earth's atmosphere.
Iodine is a micronutrient and dietary mineral that is naturally present in the food supply in some regions, especially near sea coasts, but is generally quite rare in the Earth's crust, since iodine is a so-called " heavy " element ( with the highest atomic mass of any element needed by mammals for life ), and abundance of chemical elements generally declines with greater atomic mass.
He is mainly remembered for his scheme of plant strategies to survive an unfavourable season (" life forms ") and his demonstration that the relative abundance of strategies in floras largely corresponded to the Earth's climatic zones.
abundance and crust
The abundance of the chemical elements on Earth varies from air to crust to ocean, and in various types of life.
The abundance in the earth crust is about 6. 2 mg / kg.
Its abundance in the Earth crust is about 38 mg / kg, which is the second highest among rare-earth elements, following cerium.
Its abundance in the Earth crust is 0. 5 mg / kg.
abundance and is
What is wrong with advertising is not only that it is an `` outrage, an assault on people's mental privacy '' or that it is a major cause for a wasteful economy of abundance or that it contains a coercive tendency ( which is closer to the point ).
The problem of NATO is not one of machinery, of which there is an abundance, but of the will to use it.
Generally, however, there is an abundance of available machinery of coordination -- in NATO, in O.E.C.D., in the U.N. and elsewhere.
Their main asset is an abundance of unsaturated fatty acids, so necessary for maintaining the good health of the circulatory system.
This cuisine uses cereals as the main products, since always it is produced with abundance in the country.
There is also an abundance of cypress, hickory, oak, populus, and Eastern Redcedar trees.
Amethyst is produced in abundance from the state of Minas Gerais in Brazil where it occurs in large geodes within volcanic rocks.
Snorri further writes that Asgard is a land more fertile than any other, blessed also with a great abundance of gold and jewels.
For example, the Hindu deity of Ganesh is represented as having the head of the elephant, thereby symbolizing that the fruit of righteous worships is abundance
The absence of instrumental music in New Testament worship is significant given the abundance of Old Testament references and commands.
Atlanta has a reputation as the " city in a forest " due to an abundance of trees that is unique among major cities.
The relative atomic mass ( historically and commonly also called " atomic weight ") of an element is the average of the atomic masses of all the chemical element's isotopes as found in a particular environment, weighted by isotopic abundance, relative to the atomic mass unit ( u ).
The abundance of elements in the Solar System is in keeping with their origin from nucleosynthesis in the Big Bang and a number of progenitor supernova stars.
Naturally occurring chromium is composed of three stable isotopes ; < sup > 52 </ sup > Cr, < sup > 53 </ sup > Cr and < sup > 54 </ sup > Cr with < sup > 52 </ sup > Cr being the most abundant ( 83. 789 % natural abundance ).
There is an abundance of autobiographical information on Goldoni, most of which comes from the introductions to his plays and from his Memoirs.
Bethe's original calculations suggested the CN-cycle was the Sun's primary source of energy, owing to the belief at the time that the Sun's composition was 10 % nitrogen ; the solar abundance of nitrogen is now known to be less than half a percent.
* The planet Uranus is colored cyan because of the abundance of methane in its atmosphere.
It is most commonly associated with consumption of an abundance of carrots, but it also can be a medical sign of more dangerous conditions.
abundance and estimated
Nitrogen is a common element in the universe, estimated at about seventh in total abundance in our galaxy and the Solar System.
Due to an abundance of vacant land for development and recent growth trends along the coastal areas, the city's population is expected to increase at a steady rate during the coming years to an estimated 22, 788 people by 2025.
By 1895, Red River was a booming mining camp, with gold, silver, copper, and molybdenum in some abundance, and a population estimated at three thousand.
In the star's chromosphere, a region of the outer atmosphere just above the light emitting photosphere, the proportion of iron is estimated at 74 % of the Sun's abundance.
Current population size is estimated to be 27 % of the abundance in 1970 before significant human impacts occurred.
Because of this, species abundance in coral reef fish communities was estimated to be greatest at approximately 20 % coral cover.
The abundance of predators, estimated by bait consumption, showed a similar seasonal pattern, while fruit availability decreased over time from the first to third period.
The total abundance of P. ubique and relatives is estimated to be about 2 × 10 < sup > 28 </ sup > microbes.
Relative to the Sun, the abundance of iron in the cluster is given by = – 2. 29 dex, which equates to only 0. 5 % of the solar abundance .< ref > Since 10 < sup >– 2. 29 </ sup > = 0. 00513 .</ ref > This puts the estimated age range for the cluster at, or roughly the age of the Universe.
Primordial Population III stars are estimated to have a metallicity of less than − 6. 0, that is, less than a millionth of the abundance of iron which is found in the Sun.
The age of a star can also be estimated by the abundance of lithium, as this element is destroyed through thermonuclear fusion at the core.
By fitting the observed spectrum to model spectra, it is estimated that Gliese 876 has a slightly lower abundance of heavy elements compared to the Sun ( around 75 % the solar abundance of iron ).
The total luminosity is 2. 96 times that of our Sun and its temperature 5960 K. The age of the star is estimated at approximately 3. 7 billion years, with metallicity 1. 35 times that of the Sun based on its abundance of iron.
The return abundance ( population ) of Fraser River sockeye in 2009 was estimated at a very low 1, 370, 000, 13 % of the pre-season forecast of 10, 488, 000.
The abundance of prostitutes in New York City — an estimated at 500 women plying " their trade " in 1776 — was particularly distressing for many of the Continental soldiers of a puritan-bent, George Washington included.
Total abundance in Icy Bay, Alaska was estimated at 1725 – 2372 birds in 2002, suggesting a decline of 59 % over a three-year period.
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