The ranking of elements in the universe ranks eighth in the content of elements in the universe, and silicon is extremely common.
1. hydrogen
The content of elements in the universe ranks eighth, and silicon is extremely common.
Hydrogen is a chemical element with chemical symbol H and atomic number 1, ranking first in the periodic table of elements. Its atom is the smallest of all atoms. The common elemental form of hydrogen is hydrogen.
The content of elements in the universe ranks eighth, and silicon is extremely common.
It is a colorless, odorless and flammable gas, composed of diatomic molecules, and hydrogen is the lightest gas. It is the most abundant substance in the universe. Medically, hydrogen is used to treat diseases.
The content of elements in the universe ranks eighth, and silicon is extremely common.
2. Helium
Helium is a rare gas. The name of this element comes from Greek, which means "the sun". 1868, Frenchman Janssen observed the surface of the sun with a spectroscope and found a new yellow spectral line, which he thought belonged to an unknown element on the sun, hence the name helium.
The content of elements in the universe ranks eighth, and silicon is extremely common.
Helium is a colorless and odorless gas under normal circumstances, and it is the only substance that cannot be solidified under standard atmospheric pressure. Helium is the most inactive element. Helium is mainly used as protective gas, working fluid of gas-cooled nuclear reactor and ultra-low temperature refrigerant. On February 6, 20 17, Wang and Zhou Xiangfeng of Nankai University and their collaborators published a paper on the high-pressure synthesis of sodium-helium compound-Na2He in Natural Chemistry, which ended the history of helium-free compounds and marked that China was at the forefront in the field of rare gas chemistry.
The content of elements in the universe ranks eighth, and silicon is extremely common.
3. Oxygen
Oxygen, element symbol O, is located in the group ⅵ a in the second period of the periodic table of elements. 1774, British scientist Joseph priestley focused sunlight on mercury oxide with a lens, and found a gas that could strongly promote combustion.
Antoine-Laurent lavoisier studied this gas and correctly explained its role in combustion. Oxygen is the most abundant and widely distributed element in the earth's crust, and it is also the most important element in the biological and abiotic worlds, with a content of 48.6% in the earth's crust. Oxygen accounts for 20.9% of the atmosphere.
The content of elements in the universe ranks eighth, and silicon is extremely common.
4. Carbon
Carbon is a nonmetallic element, which is located in the second periodic group of the periodic table of elements. Carbonium in Latin means "coal, charcoal". Carbon is a very common element, which exists widely in the atmosphere, crust and living things in various forms.
The content of elements in the universe ranks eighth, and silicon is extremely common.
Simple carbon has long been recognized and utilized, and a series of compounds of carbon-organic matter are the basis of life. It is one of the components of carbon pig iron, wrought iron and steel. Carbon can chemically combine with itself to form a large number of compounds, which are biologically and commercially important molecules. Most molecules in organisms contain carbon.
The content of elements in the universe ranks eighth, and silicon is extremely common.
5. neon lights
Neon is a chemical element with chemical symbol Ne and atomic number 10. It is a colorless rare gas that turns orange-red when discharged.
The content of elements in the universe ranks eighth, and silicon is extremely common.
Neon is the most commonly used among neon lights. The air contains a small amount of neon. Belonging to the zero group element, it is one of the rare gas members. Stable compounds that have not yet been prepared exist in the form of monoatomic molecules (neon) in nature, so neon is generally separated from the air.
The content of elements in the universe ranks eighth, and silicon is extremely common.
6. Nitrogen
Nitrogen is a chemical element with chemical symbol N and atomic number 7. Nitrogen is the most abundant element in the air, which exists widely in nature and plays a great role in organisms. It is one of the basic elements of amino acids. Nitrogen and its compounds are widely used in production and life.
The content of elements in the universe ranks eighth, and silicon is extremely common.
7. Magnesium
1808, David reduced magnesium oxide with potassium to make metallic magnesium. It is a silvery white light alkaline earth metal with active chemical properties, which can react with acid to generate hydrogen, and has certain ductility and heat dissipation. Magnesium is widely distributed in nature and is one of the essential elements for human body.
The content of elements in the universe ranks eighth, and silicon is extremely common.
8. Silicon
Silicon is a chemical element, and its chemical symbol is Si, formerly known as silicon. The atomic number is 14 and the relative atomic mass is 28.0855. Amorphous silicon and crystalline silicon have two allotropes, which belong to the third period of the periodic table of elements and belong to the quasi-metallic elements of IVA family.
The content of elements in the universe ranks eighth, and silicon is extremely common.
Silicon is also a very common element. However, it rarely appears in the form of simple substance in nature, but in the form of composite silicate or silicon dioxide, which is widely found in rocks, gravel and dust. Silicon ranks eighth in the universe. In the crust, it is the second most abundant element, accounting for 26.4% of the total mass of the crust, second only to oxygen (49.4%).
The content of elements in the universe ranks eighth, and silicon is extremely common.
9. Iron
Iron is a metal element with atomic number 26 and its chemical formula is Fe. Pure iron is white or silvery white with metallic luster. Melting point 1538℃, boiling point 2750℃, soluble in strong acid and medium acid, insoluble in water. The valence of iron is 0, +2, +3 and +6, of which +2 and +3 are common and +6 is rare.
The content of elements in the universe ranks eighth, and silicon is extremely common.
Iron is widely distributed in life, accounting for 4.75% of the earth's crust content, second only to oxygen, silicon and aluminum, ranking fourth in the earth's crust content. Pure iron is a silvery white metal with flexibility and good ductility, which is used to make iron cores of generators and motors. Iron and its compounds are also used to make magnets, medicines, inks, pigments, abrasives, etc. It is one of the "black metals" in industry (the other two are chromium and manganese). In addition, the human body also contains iron, and ferrous ion with valence of +2 is an important component of hemoglobin, which is used for oxygen transportation.
The main iron ores used are Fe2O3 (hematite), Fe3O4 (magnetite), FeCO3 (siderite) and FeS2 (pyrite). ...
The content of elements in the universe ranks eighth, and silicon is extremely common.
10. Sulfur
Sulfur is a nonmetallic element with chemical symbol S and atomic number 16. It is one of the thio-oxygen group elements (ⅵ A group), which is located in the third period of the periodic table of elements.
Usually elemental sulfur is yellow crystal, also called sulfur. Sulfur has many allotropes, such as rhombic sulfur, monoclinic sulfur and elastic sulfur. Sulfur exists in nature in the form of sulfide, sulfate or simple substance. Sulfur is insoluble in water, slightly soluble in ethanol and easily soluble in carbon disulfide.
The content of elements in the universe ranks eighth, and silicon is extremely common.
Sulfur is an important element of human protein, which is of great significance to human life activities. Sulfur is mainly used to produce fertilizers, gunpowder, lubricants, pesticides and antifungal agents.
However, sulfur dioxide (S+O2= ignition =SO2) produced by the combustion of sulfur-containing ore combines with water in the air to generate sulfurous acid, which reacts with oxygen in the air to generate sulfuric acid, thus causing sulfuric acid rain. For human body, natural element sulfur is non-toxic and harmless, dilute sulfuric acid, sulfate, sulfurous acid and sulfite are toxic, and sulfide is usually highly toxic. Concentrated sulfuric acid will corrode human skin.
The content of elements in the universe ranks eighth, and silicon is extremely common.
cosmic abundance
An important physical quantity describing the nature of celestial bodies. That is, celestial bodies in space (interstellar matter). Planets, galaxies and total galaxies, the relative amount of this element or isotope is expressed by the value compared with si or the percentage in the whole, which is called cosmic abundance.
The content of elements in the universe ranks eighth, and silicon is extremely common.
Cosmic abundance of elements
The relative contents of various elements in the universe. The abundance of elements in the universe is the basis of studying the origin of elements and explaining the evolution process of various celestial bodies, so it is an important topic in space chemistry research. The abundance of elements in the universe is usually 10 in silicon, and the abundance of other elements is compared with that of silicon.
After reading the ranking of cosmic elements listed above, I believe everyone knows about these ten cosmic elements! At present, the ability of human beings to explore the universe scientifically is limited, because the universe is too huge, so it still needs time and energy to make continuous efforts!