hyperfine spectrum
41Atomic line filter — A potassium Faraday filter designed, built and photographed by Jonas Hedin for making daytime LIDAR measurements at Arecibo Observatory.[1] An atomic line filter (ALF) is an advanced optical band pass filter used in the physical sciences for… …
42Zilog Z80 — One of the first Z80 microprocessors manufactured; the date stamp is from June 1976. Produced 1976 Common manufacturer(s) Zilog …
43Rubidium — krypton ← rubidium → strontium K ↑ Rb ↓ …
44Timeline of knowledge about the interstellar and intergalactic medium — Timeline of the interstellar medium and intergalactic medium* 1848 Lord Rosse studies M1 and names it the Crab Nebula * 1864 William Huggins studies the spectrum of the Orion Nebula and shows that it is a cloud of gas * 1927 Ira Bowen explains… …
45Hydroxyl radical — IUPAC name Hydroxyl radical …
46Cyano radical — Preferred IUPAC name Cyano radical …
47Sodium — This article is about the chemical element. For the PlayStation Home game, see Sodium (PlayStation Home). neon ← sodium → magnesium Li ↑ Na ↓ K …
48Xenon — (PronEng|ˈzɛnɒn [Xenon, entry in the Oxford English Dictionary, prepared by J. A. Simpson and E. S. C. Weiner, vol. 20, second edition, Oxford: Clarendon Press, 1989. ISBN 0 19 861232 X (vol. 20), ISBN 0 19 861186 2 (set.)] or IPAlink en|ˈziːnɒn… …
49Magnetochemistry — is concerned with the magnetic properties of chemical compounds. Magnetic properties arise from the spin and orbital angular momentum of the electrons contained in a compound. Compounds are diamagnetic when they contain no unpaired electrons.… …
50Carboxylic acid — Structure of a carboxylic acid Carboxylate ion …
