[Chemical Knowledge]：What is hydrogen?

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As the first element in the chemical elements, hydrogen has an important position in science and industry, and it plays an extremely important role in various fields such as space, the earth's atmosphere, and human cells.

In nature, hydrogen is widely found in gaseous, liquid and solid states and is one of the simplest elements on earth. Its atomic weight is 1.008, is a colorless, tasteless, odorless gas. Hydrogen is widely around us, especially in water, the chemical structure of the water molecule is H2O, that is, an oxygen atom and two hydrogen atoms. At the same time, hydrogen is also the most abundant element in the universe, accounting for about 90% of the total mass of all elements.

hydrogen was first discovered by British chemist Henry Cavendish in 1766. He discovered through experiments that a gas is produced in a container filled with acid and metal, which is hydrogen. Since then, hydrogen has been widely used in research, invention and industry. For example, high concentrations of liquid hydrogen and oxygen are used in rocket engines to generate powerful thrust and realize space exploration; in industry, hydrogen is also widely used as a cleaning or cutting tool.

In addition to space exploration and industry, hydrogen has important medical and energy applications. Proper hydrogen intake can improve immunity, relieve endocrine disorders, and prevent the occurrence of chronic diseases such as diabetes. In terms of energy, hydrogen is also known as the "Clean Energy Star" because the only exhaust gas produced by its combustion is water vapor. Compared with fossil fuels, hydrogen does not produce environmental pollution such as carbon dioxide and is a green and clean energy.

, however, with the application of hydrogen energy continues to expand, some problems have gradually surfaced. For example, the production process of hydrogen requires a lot of electricity, and if traditional fossil fuels are used to supply electricity, the cleanliness of hydrogen is no longer prominent. Hydrogen itself has a high risk of explosion, and if it explodes under improper manipulation, the consequences will be unimaginable.

To sum up, hydrogen, as the simplest and most extensive chemical element, not only exists around us, but also has important applications in the fields of space exploration, health care and energy. In the future, we look forward to making hydrogen, as a clean and green energy source, better serve the development of human society through technological innovation and scientific research.

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