en
Books
Удобнее в приложении:
iOS
·Android
30-Second Elements
183 бумажные страницы
- Правообладатель
- Bookwire
- Дата публикации оригинала
- 2013
- Год выхода издания
- 2013
- Издательство
- Icon Books
Цитаты
- ☁️ ursula ☁️цитирует5 лет назад
Today, three quarters of a million tons of argon are extracted annually from liquefied air, because its very inertness makes it useful. You can fill light bulbs, fluorescent tubes and double-glazed windows with it, or use it as a propellant for aerosols, industrial sprays and even futuristic ion-propulsion spacecraft engines, without worrying that it will react or be toxic. - ☁️ ursula ☁️цитирует5 лет назадLike the other elements that share its column in the periodic table, it is an inert gas: unreactive, if not downright lazy (the quality for which it’s named). Argon does not lose or share any electrons by undergoing chemical reactions; it has a so-called filled shell of electrons.
- ☁️ ursula ☁️цитирует5 лет назадRamsay confirmed that these gases were, indeed, unique elements by examining the characteristic spectrum of light they produce when excited by an electric discharge. His co-worker, fellow British chemist Morris Travers, was thrilled to note a ‘blaze of crimson light’ in the case of neon.
fb2epub
Перетащите файлы сюда,
не более 5 за один раз