en
Bøger
Eric Scerri

30-Second Elements

When was radium discovered? Who are Dmitri Mendeleev and Glenn T. Seaborg? Who discovered uranium's radioactivity? Which element is useful for dating the age of Earth? And why doesn't gold have a scientific name?
30-Second Elements presents you with the very foundations of chemical knowledge, explaining concisely the 50 most significant chemical elements.
This book uses helpful glossaries and tables to fast track your knowledge of the other 68 elements and the relationships between all of them.
183 trykte sider
Copyrightindehaver
Bookwire
Oprindeligt udgivet
2013
Udgivelsesår
2013
Har du allerede læst den? Hvad synes du om den?
👍👎

Citater

  • ☁️ ursula ☁️har citeretfor 5 år siden
    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 ☁️har citeretfor 5 år siden
    Like 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 ☁️har citeretfor 5 år siden
    Ramsay 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.

På boghylderne

fb2epub
Træk og slip dine filer (ikke mere end 5 ad gangen)