フランシス・アストン
Francis William Aston(1877-1945)
ようこそ!フリーイラストポートレートと
歴史の停車場いらすとすてーしょんへ
こちらのページでは アストン 20世紀に
活躍した世界の化学者⑦をお楽しみください
アストン
イラストポートレート Syusuke Galleryより
![1877-1945を生きた化学者であり物理学者。質量分析器の開発者であり、この分析器を用いてネオン(Ne)をはじめ多くの非放射性元素の同位体を発見した。そして、この元素の同位体には質量数が整数であるという整数則の提唱した。この功績により1922年ノーベル化学賞を受賞している。](https://illuststation196.com/wp-content/uploads/2024/06/Francis-William-Aston.jpeg)
英国出身 1877-1945
質量分析器の開発者であり
この分析器を用いてネオン(Ne)をはじめ
多くの非放射性元素の同位体を発見した
この元素の同位体には質量数が整数であるという
整数則の提唱し1922年ノーベル化学賞を受賞している
20世紀の化学
![](https://illuststation196.com/wp-content/uploads/2022/11/painter.jpg)
いらすとすてーしょんでは化学の部屋より20世紀に活躍した世界の化学者と題してイラストポートレートをお届けします
(参考)18世紀に活躍した世界の化学者たち
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(参考)19世紀に活躍した世界の化学者たち
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19世紀に活躍した世界の化学者(1)はこちら↓
19世紀に活躍した世界の化学者(2)はこちら↓
19世紀に活躍した世界の化学者(3)はこちら↓
(参考)20世紀に活躍した世界の化学者たち
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20世紀に活躍した世界の化学者(1)はこちら↓
20世紀に活躍した世界の化学者(2)はこちら↓
20世紀に活躍した世界の化学者(3)はこちら↓
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さて今回はアストンをお届けします
整数則の提唱
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アストンはどんな化学者だったの?
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アストンは整数則の提唱した化学者でした
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整数則??
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では、アストンの提唱した「すべての元素の同位体の質量数は、ほぼ整数の値を持つ」とした整数則について理解を深めてみましょうか!
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まず、この法則は質量分析器を用いて、元素の同位体組成を測定した結果から次の仮説を立てて導き出されてました
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仮説ねぇ…
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陽子・中性子仮説
- 原子核は、陽子と中性子という2種類の粒子で構成されている
- 元素の同位体は、陽子数の違いによってのみ生じる
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…
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まぁ難しいことは置いておいて、この仮説は後に証明され、整数則が導かれます
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そして元素の性質や原子核の構造をより深く理解することができるようになったのです
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なるほど…
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一方で、この整数則には限界もありますよ
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できることと、できないことの両側面があるのかぁ…
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整数則の限界
- すべての元素に当てはまるわけではない※
※例えば、水素の同位体である重水素(デュテリウム)や三重水素(トリチウム)の質量は、厳密には整数から外れている - 質量欠損※を説明できない
※原子核の質量が構成する陽子と中性子の質量の合計よりも小さい現象
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とにかく、すごい法則を発見した化学者だったのだね
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アストンのこの整数則※は、化学だけでなく物理学にも大きな影響を与えたのです
※Aston, F. W. (1921). The constitution of atomic systems. The Faraday Society Transactions, 17(1), 433-452.
1922年ノーベル化学賞受賞
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それで、この研究から1922年にノーベル化学賞を受賞か!
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ノーベル賞受賞された方々のイラストポートレートはこちらにアップしていますので、ぜひお立ち寄りください
ノーベル賞の部屋 Nobel Prizes
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今回も難しかったけど、アストンという化学者を知れて良かったよ!
次回はサバティエ
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さて今回の20世紀に活躍した世界の化学者⑦アストンは如何でしたか?
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いらすとすてーしょんでは化学の歴史を彩ってきた偉人たちを…
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これからもご紹介していきます
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どうぞお楽しみに!
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サバティエは、触媒化学を研究した化学者です
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ぜひサバティエのイラストポートレートページにもお越しください
20世紀に活躍した世界の化学者たち
化学・新着偉人(It's New)はこちらから
【化学の部屋|テオレル】20世紀に活躍した世界の化学者XXX
【化学の部屋|アレニウス】20世紀に活躍した世界の化学者XXⅨ
【化学の部屋|ジグモンディ】20世紀に活躍した世界の化学者XXⅧ
【化学の部屋|オストヴァルト】20世紀に活躍した世界の化学者XXⅦ
化学の部屋へようこそ
出身国別、都道府県でお届けしています
化学の部屋 Chemist
化学の部屋Chemistへようこそ。SyusukeGalleryよりイラストポートレートをお届けさせていただきます。
広告コーナー
いらすとすてーしょんはGoogle AdSenseの収益により
運営させていただいております
皆様のご理解をよろしくお願い申し上げます
いらすとすてーしょん検索コーナー
いらすとすてーしょん検索コーナーh
いらすとすてーしょん検索コーナー
新着偉人(It's New)
新たに公開のイラストポートレートをご覧ください
【経営者の部屋|大原孝四郎】明治時代編.7New!!
【経営者の部屋|岩井文助】明治時代編.6
2024年パリ オリンピック、パラリンピック開催を記念して「いらすとすてーしょん」ではオリンピックに関連する偉人たちのイラストポートレートをお届けしました↓
9月1日から経営者の部屋より、明治時代編をお届けします↓
いらすとすてーしょん新キャラクター
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2022年より"いらすとすてーしょん"にお立ち寄りいただきありがとうございます
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さて本年いらすとすてーしょんの新キャラクターが誕生しました
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シューちゃんです
![シューちゃんはいらすとすてーしょんのキャラクターです](https://illuststation196.com/wp-content/uploads/2024/01/Syu-chan-1024x1024.jpeg)
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シュー(Syu)です
よろしくね
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3年目を迎えた2024年も皆様に役立つ世界の偉人たちをシューちゃんと共にフリーイラストポートレートをお届けします
いらすとすてーしょんからのお知らせ
![創業76年を迎える総合広告代理業を営む栄光社のイチオシと「いらすとすてーしょん」のコラボレーションが2022年7月1日ついにオープン!イチオシ美術とそのイラストポートレートで贈る作者をぜひご堪能ください](https://illuststation196.com/wp-content/uploads/2022/06/栄光社いらすとすてーしょんコラボPPT-1024x217.jpg)
![創業76年を迎える総合広告代理業を営む栄光社のイチオシと「いらすとすてーしょん」のコラボレーションが2022年7月1日ついにオープン!イチオシ美術とそのイラストポートレートで贈る作者をぜひご堪能ください](https://illuststation196.com/wp-content/uploads/2022/06/栄光社いらすとすてーしょんコラボPPT-1024x217.jpg)
いらすとすてーしょん「Syusuke Gallery」
コラボレーション
「イチオシ」で取り上げられた美術のその作者を
イラストポートレートで贈ります
皆様のお越しをお待ちしております