A colorless, odorless, and tasteless gas that is the lightest element in the periodic table, often used as a basic building block in various chemical reactions and compounds, including water.
The most abundant element in the universe, characterized by its simple atomic structure and commonly produced through processes such as electrolysis of water and the reaction of hydrocarbons with water.
A highly flammable nonmetallic element that, when combined with oxygen, forms water, and is essential in numerous industrial applications as well as in the study of nuclear fusion.
Example:
酸素と水素から水ができる。
A chemical compound consisting of hydrogen and oxygen, recognized for its powerful oxidizing properties as well as its ability to act as a reducing agent, commonly represented by the formula H₂O₂.
A viscous, colorless, and potentially explosive liquid that decomposes into water and oxygen in the presence of certain catalysts, often used in applications like rocket fuel.
A solution employed in various industries for its bleaching and disinfecting capabilities, commonly found in household products as a sterilizing agent.
A category of chemical compounds composed exclusively of carbon and hydrogen atoms, which can be categorized into various types based on their molecular structure and bonding arrangements.
Organic compounds that are primarily made up of carbon and hydrogen, characterized by differing degrees of saturation and structural formations, including straight-chain, branched, and cyclic variations.
Compounds formed solely from carbon and hydrogen that can undergo various reactions, resulting in classifications such as alkanes, alkenes, and aromatic hydrocarbons based on their specific bonding characteristics and molecular shapes.
A class of naturally occurring and synthetic substances that serve as crucial components in fuels, lubricants, and raw materials for numerous chemical processes, reflecting the diversity of molecular structures that define their properties and uses.
A highly corrosive, acidic compound that contains fluorine, known for its ability to dissolve glass and react with many materials, often used in industrial processes and chemical manufacturing.
A colorless liquid that poses significant health hazards and can cause severe burns upon contact with skin, highlighting the importance of safety precautions when handling.
An aqueous solution of hydrogen fluoride, utilized in various applications including etching and cleaning metal surfaces, while requiring specialized equipment due to its toxic properties.
A colorless and toxic gas that has a strong odor reminiscent of rotten eggs, commonly found in volcanic gases and mineral springs, known for its chemical formula H₂S.
A compound that can be generated in laboratory settings by reacting iron sulfide with dilute hydrochloric acid, and is recognized for its ability to produce a blue flame when burned in air, resulting in sulfur dioxide.
A gas that exhibits reducing properties, capable of reacting with various metals to form metal sulfides, which can precipitate in characteristic colors when dissolved in solutions containing metal salts.
A slightly soluble gas in water that displays weak acidity, often used as an important reagent in qualitative analysis to identify metals through the formation of colored sulfide precipitates.