まとめ
この研究では,土壌の断片に,おそらく太陽風からの惰性ガスが見つかりました. ガスには表面相関関係があり,サンプルのカリウム-アルゴンの年齢は442億年であった.
科学分野:
- 地質化学 地質化学
- 宇宙化学 (コスモケミストリー)
- 惑星科学は惑星科学である.
背景:
- 土壌の断片には,かなりの量の惰性ガスが含まれています.
- ガス濃度は粒子の大きさと逆の関係を示し,表面相関を示唆しています.
研究 の 目的:
- 土壌サンプル10084,40.40の惰性ガスの起源と特性を調査する.
- 試料のイソトープ組成と潜在的な年齢を決定する.
主な方法:
- 素粒子の大きさとの関係における惰性ガス濃度の分析.
- 元素と同位体比の比較と太陽と隕石の値.
- カリウム-アルゴン年齢の計算.
主要な成果:
- 粒子の大きさに反比例して,表面の相関を示した実質的な惰性ガスが見つかりました.
- ガラスとフェルドスパートは,岩石の断片よりもガス量が少ない.
- 元素比は太陽の値と異なるが,同位体比は隕石に似ている.
- アルゴン-40は,放射性成分と表面関連成分の両方を含んでいます.
結論:
- 惰性ガスは,太陽風や太陽の宇宙線から発生する可能性があります.
- サンプルは,地球外物質と一致する特徴を示しています.
- 4.42億年前のカリウム-アルゴン年代が計算され,古代の起源を示唆しています.
さらに関連する動画
関連する概念動画
Noble Gases
The elements in group 18 are noble gases (helium, neon, argon, krypton, xenon, and radon). They earned the name “noble” because they were assumed to be nonreactive since they have filled valence shells. In 1962, Dr. Neil Bartlett at the University of British Columbia proved this assumption to be false.
The Equilibrium Constant
Consider the oxidation of sulfur dioxide:
Physical Principles Governing Gas Exchange
Gas behavior plays a vital role in understanding bodily processes such as external and internal respiration. External respiration involves the diffusion of oxygen into the blood and carbon dioxide out of it in the lungs. In contrast, internal respiration happens in body tissues, where these gases move in opposite directions.
Gas Laws Governing Respiration
The behavior of gases is guided by Dalton's Law of partial pressures and Henry's Law.
Dalton's Law asserts that the total pressure exerted by...
Gas Laws Governing Respiration
The behavior of gases is guided by Dalton's Law of partial pressures and Henry's Law.
Dalton's Law asserts that the total pressure exerted by...
Qualitative Analysis
For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
For instance, group IV...
Gas Solubility
Gas solubility in liquids forms liquid-gas solutions, such as soft drinks, where carbon dioxide is dissolved in water, and the ocean, where the solubility of oxygen and carbon dioxide supports marine life. The ability of oceans to dissolve gases impacts weather conditions in the troposphere.However, gas-liquid interactions vary. For instance, hydrogen chloride gas is highly soluble in water, while oxygen's solubility is much lower. Because these solutions are non-ideal, Raoult’s law, which...
Molecular Comparison of Gases, Liquids, and Solids
Particles in a solid are tightly packed together (fixed shape) and often arranged in a regular pattern; in a liquid, they are close together with no regular arrangement (no fixed shape); in a gas, they are far apart with no regular arrangement (no fixed shape). Particles in a solid vibrate about fixed positions (cannot flow) and do not generally move in relation to one another; in a liquid, they move past each other (can flow) but remain in essentially constant contact; in a gas, they move...


