(chemistry) a substance used in or produced by a reaction that changes atoms or molecules
化学物質
the parts or elements that something consists of and the way they are combined
組成, 構成
a pure substance formed from two or more chemical elements chemically bonded in fixed proportions
化合物
derived from, produced by, or relating to living organisms
有機, 有機性
describing chemical compounds that do not contain carbon-hydrogen bonds and are typically derived from minerals or non-living matter
無機の
塩化ナトリウム（食卓塩）は、調理や食品保存に広く使用されている無機化合物です。
a liquid that is capable of dissolving another substance
溶媒, 溶剤
エタノールは、アフターシェーブやコロンの製造のために油や香水のエッセンスを溶かす溶媒として一般的に使用されています。
a substance that is dissolved in a solvent, resulting in a solution
溶質, 溶解物質
塩水では、塩（NaCl）が溶媒である水に溶ける溶質です。
(of a substance) able to break up and disperse within a fluid
可溶性の
砂糖は水に非常に溶けやすい、液体に加えるとすぐに溶けます。
unable to be dissolved, especially in a liquid
不溶性の, 溶解しない
砂糖は冷たい水に溶けずに残った。
a mixture of different liquids
溶液, 混合物
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, leading to variation in atomic mass
同位体, 同位体の形態
炭素12と炭素14は炭素の同位体であり、前者は6つの中性子を持ち、後者は8つの中性子を持っています。
a combination of two or more metals, creating a metal that is usually stronger or more resistant
合金
合金は、2つ以上の金属、または金属と他の元素の混合物です。
a compound with a hydroxyl group (-OH) attached to a carbon atom, widely used as solvents, fuels, and in pharmaceutical and chemical synthesis
アルコール, エタノール
(chemistry) a dark liquid from underground, made of hydrocarbons, used to make fuel and plastic
石油
(chemistry) a compound made when the hydrogen in an acid is replaced by a metal or a metal-like group
塩
a hard alloy consisting mainly of copper and tin
青銅
a type of hard metal that is made of a mixture of iron and carbon, used in construction of buildings, vehicles, etc.
鋼, 硬い金属
(chemistry) a soft, gray-black form of carbon used as a lubricant and as a moderator in nuclear reactors
黒鉛, 石墨
a usually solid and hard substance that heat and electricity can move through, such as gold, iron, etc.
金属
made of or resembling metal
金属の, 金属のような
キッチン家電はメタリックな仕上げが施されており、部屋に洗練された現代的な外観を加えていました。
(chemistry) a salt or ester of sulfurous acid used as a preservative in foods and wines
亜硫酸塩
a numerical measure of how acidic or basic a solution is, based on hydrogen-ion activity
any water-soluble compound that can turn litmus blue and reacts with an acid to form a salt and water
アルカリ, 塩基
水酸化ナトリウムは、石鹸製造に一般的に使用される強いアルカリです。
(chemistry) a substance that can accept protons, donate electrons, or release hydroxide ions in aqueous solution
塩基
a water-soluble chemical substance that contains Hydrogen and has a sour taste or corrosive feature with a PH less than 7
酸, 酸性物質
the level of acid in a substance, often measured by a pH below 7
酸性度, 酸のレベル
植物がよく育つには土壌の酸性度が高すぎました。
(chemistry) able to act as either an acid or a base depending on the conditions
両性の, 両性電解質の
the gradual destruction of materials by chemical reaction, usually of metals
腐食
古い家の配管は腐食によってひどく損傷し、配管システム全体に漏れが生じました。
to heat a liquid and turn it into gas then cool it and make it liquid again in order to purify it
蒸留する, 蒸留によって精製する
化学者は現在、純粋な化合物を分離するために溶液を蒸留しています。
a fundamental unit in chemistry that represents the amount of substance containing as many entities (atoms, molecules) as there are in 12 grams of carbon-12
モル, 物質量
(chemistry) to become separated from the solvent in a solid form
沈殿する
火山の噴火口での冷却プロセスにより、鉱物が沈殿し、見事な鍾乳石と石筍が形成されました。
having a tendency to change rapidly and unpredictably, often characterized by fluctuations or instability
揮発性の, 不安定な
この地域の天気は一年中非常に変わりやすいことがあります。
a solution containing a weak acid and its conjugate base, or a weak base and its conjugate acid, which maintains a stable pH when small amounts of acid or base are added
緩衝液, バッファー溶液
実験室の緩衝液は、強酸を加えた後でもpHを安定させました。
a solution of ammonia gas dissolved in water, commonly called aqueous ammonia
アンモニア水,水性アンモニア
農家は土壌にアンモニアを施用して窒素を供給しました。
to become incorporated into a liquid and form a solution
溶ける, 溶解する
