From: owner-ammf-digest@smoe.org (alt.music.moxy-fruvous digest) To: ammf-digest@smoe.org Subject: alt.music.moxy-fruvous digest V14 #12902 Reply-To: ammf@fruvous.com Sender: owner-ammf-digest@smoe.org Errors-To: owner-ammf-digest@smoe.org Precedence: bulk alt.music.moxy-fruvous digest Wednesday, December 27 2023 Volume 14 : Number 12902 Today's Subjects: ----------------- Huge Fall Savings on Custom Canvas Prints! ["Canvas Prints Advertisement"] ---------------------------------------------------------------------- Date: Wed, 27 Dec 2023 13:36:36 +0100 From: "Canvas Prints Advertisement" Subject: Huge Fall Savings on Custom Canvas Prints! Huge Fall Savings on Custom Canvas Prints! http://promindbraincomplex.services/-M3yVWHkYIQWqZlQK1cP3a8jmdJJmJJQJ-ir7atjxkimxV3JGQ http://promindbraincomplex.services/FT8QhobFIhbpScZTwoh-lTROzj7tVI74cY5buWF1g6mURZTQ3w The Bohr model worked well for hydrogen and ionized single electron Helium which impressed Einstein, but could not explain more complex elements. By 1919, Bohr was moving away from the idea that electrons orbited the nucleus and developed heuristics to describe them. The rare-earth elements posed a particular classification problem for chemists, because they were so chemically similar. An important development came in 1924 with Wolfgang Pauli's discovery of the Pauli exclusion principle, which put Bohr's models on a firm theoretical footing. Bohr was then able to declare that the as-yet-undiscovered element 72 was not a rare-earth element, but an element with chemical properties similar to those of zirconium. (Elements had been predicted and discovered since 1871 by chemical properties) and Bohr was immediately challenged by the French chemist Georges Urbain, who claimed to have discovered a rare-earth element 72, which he called "celtium". At the Institute in Copenhagen, Dirk Coster and George de Hevesy took up the challenge of proving Bohr right and Urbain wrong. Starting with a clear idea of the chemical properties of the unknown element greatly simplified the search process. They went through samples from Copenhagen's Museum of Mineralogy looking for a zirconium-like element and soon found it. The element, which they named hafnium (Hafnia being the Latin name for Copenhagen) turned out to be more common than gold. In 1922 Bohr was awarded the Nobel Prize in Physics "for his services in the investigation of the structure of atoms and of the radiation emanating from them". The award thus recognised both the Trilogy and his early leading work in the emerging field of quantum mechanics. For his Nobel lecture, Bohr gave his audience a compre ------------------------------ End of alt.music.moxy-fruvous digest V14 #12902 ***********************************************