Science
Noble Gases
Helium He (2), Neon Ne (8), Argon Ar (18), Krypton Kr (36), Xenon Xe (54), Radon Rn (86) - Oganesson Og (118)
(He near crux run)
William Ramsay UCL 1890s - fractional distillation of air - Nobel Prize 1904
Friedrich Ernst Dorn Halle - radon from decay of radium
Halogens
Fluorine F (7), Chlorine (17), Bromine (35), Iodide (53), Astanine (85), Tennesine Ts (117)
(For clubber, I at T's)
Halogens = salt makers (when combined with metals)
Elements known before 1600
only fourteen
Fe (26), Zn (30)
Cu (29), Ag (47), Au (79), Pl (78), Hg (80)
C (6), Sn (50), Pb (82), As (33), Sb (51), Bi (83)
S (16)
What is the only letter not appearing on the Periodic Table?
J
Elements lowest boiling, highest melting points
Helium (He), Tungsten (W)
10 Most Common Elements in Universe
Hydrogen - 70% (big bang, depleted by stellar fusion)
Helium - 28% (big bang 25, created by stellar fusion 3)
Oxygen - 1% (fusion in pre-supernova stars, CNO cycle)
Carbon, Nitrogen = Neon
Normal Matter, Dark Matter, Dark Energy
5%, 25%, 70%
Periodic Table - Poisoners Corner
Hg (80), Tl, Pb, (Bi), Po
Element - Bismuth
Bi (83) - low melting point, iridescent crystals
diamagnetic (repelled by a magnetic field)
Uses: Peptobismuth (pink, treat diarrhea); alloys as replacement for (toxic) Pb
Only elements liquid at room temperature?
Mercury and Bromine