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Monopoly

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Picture of the Day

Picture of the day The plains-wanderer (Pedionomus torquatus) is a bird in the family Pedionomidae, of which it is the only surviving species. Endemic to Australia, its historical range included Victoria, New South Wales, South Australia and the Northern Territory, but in recent years it has become endangered, with remaining known populations concentrated in the Riverina (a region in southwestern New South Wales) and western Queensland. The plains-wanderer is a quail-like ground bird, measuring 15 to 19 centimetres (5.9 to 7.5 in). The adult male is light brown above, with fawn-white underparts with black crescents. The adult female is substantially larger than the male and has a distinctive white-spotted black collar. This female plains-wanderer was photographed in the Riverina, north of the town of Deniliquin, New South Wales.Photograph credit: John Harrison

In the News

Hossein Amir-Abdollahian A landslide in Papua New Guinea's Enga Province leaves hundreds of people missing. The European Union passes the Artificial Intelligence Act, aiming to establish a regulatory and legal framework for AI. A helicopter crash near Varzaqan, Iran, kills eight people, including President Ebrahim Raisi and Foreign Minister Hossein Amir-Abdollahian (pictured). In boxing, Oleksandr Usyk defeats Tyson Fury to become the first undisputed heavyweight champion in twenty-four years. Ongoing: Israel–Hamas war timeline Russian invasion of Ukraine timeline War in Sudan timeline Recent deaths: Kabosu Ivan Boesky Narayanan Vaghul David Wilkie Fernando Martínez Castellano John Koerner

On this Day

May 25: Africa Day (1963); Independence Day in Jordan (1946) Samuel Taylor Coleridge 1816 – The poems Kubla Khan and Christabel by English poet Samuel Taylor Coleridge (pictured) were published. 1944 – The Wehrmacht and their collaborationist allies launched Operation Rösselsprung, a failed attempt to assassinate the Yugoslav Partisan leader Josip Broz Tito. 1961 – A fire broke out at a squatter settlement in Bukit Ho Swee, Singapore, rendering approximately 16,000 people homeless. 1979 – During takeoff from O'Hare International Airport in Chicago, an engine detached from American Airlines Flight 191, causing a crash that killed 273 people in the deadliest aviation accident in United States history. 2009 – North Korea conducted a nuclear test and several other missile tests that were widely condemned internationally and led to sanctions from the United Nations Security Council. Mary Magdalene de' Pazzi (d. 1607) Anna Maria Rückerschöld (d. 1805) Gustav Holst (d. 1934) Cillian Murphy (b. 1976) More anniversaries: May 24 May 25 May 26

periodic table

Periodic table Group 1 2   3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Hydrogen & alkali metals Alkaline earth metals Triels Tetrels Pnicto­gens Chal­co­gens Halo­gens Noble gases Period 1 Hydro­gen1H​1.0080 He­lium2He​4.0026 2 Lith­ium3Li​6.94 Beryl­lium4Be​9.0122 Boron5B​10.81 Carbon6C​12.011 Nitro­gen7N​14.007 Oxy­gen8O​15.999 Fluor­ine9F​18.998 Neon10Ne​20.180 3 So­dium11Na​22.990 Magne­sium12Mg​24.305 Alumin­ium13Al​26.982 Sili­con14Si​28.085 Phos­phorus15P​30.974 Sulfur16S​32.06 Chlor­ine17Cl​35.45 Argon18Ar​39.95 4 Potas­sium19K​39.098 Cal­cium20Ca​40.078 Scan­dium21Sc​44.956 Tita­nium22Ti​47.867 Vana­dium23V​50.942 Chrom­ium24Cr​51.996 Manga­nese25Mn​54.938 Iron26Fe​55.845 Cobalt27Co​58.933 Nickel28Ni​58.693 Copper29Cu​63.546 Zinc30Zn​65.38 Gallium31Ga​69.723 Germa­nium32Ge​72.630 Arsenic33As​74.922 Sele­nium34Se​78.971 Bromine35Br​79.904 Kryp­ton36Kr​83.798 5 Rubid­ium37Rb​85.468 Stront­ium38Sr​87.62 Yttrium39Y​88.906 Zirco­nium40Zr​91.224 Nio­bium41Nb​92.906 Molyb­denum42Mo​95.95 Tech­netium43Tc​[97] Ruthe­nium44Ru​101.07 Rho­dium45Rh​102.91 Pallad­ium46Pd​106.42 Silver47Ag​107.87 Cad­mium48Cd​112.41 Indium49In​114.82 Tin50Sn​118.71 Anti­mony51Sb​121.76 Tellur­ium52Te​127.60 Iodine53I​126.90 Xenon54Xe​131.29 6 Cae­sium55Cs​132.91 Ba­rium56Ba​137.33 Lute­tium71Lu​174.97 Haf­nium72Hf​178.49 Tanta­lum73Ta​180.95 Tung­sten74W​183.84 Rhe­nium75Re​186.21 Os­mium76Os​190.23 Iridium77Ir​192.22 Plat­inum78Pt​195.08 Gold79Au​196.97 Mer­cury80Hg​200.59 Thallium81Tl​204.38 Lead82Pb​207.2 Bis­muth83Bi​208.98 Polo­nium84Po​[209] Asta­tine85At​[210] Radon86Rn​[222] 7 Fran­cium87Fr​[223] Ra­dium88Ra​[226] Lawren­cium103Lr​[266] Ruther­fordium104Rf​[267] Dub­nium105Db​[268] Sea­borgium106Sg​[269] Bohr­ium107Bh​[270] Has­sium108Hs​[269] Meit­nerium109Mt​[278] Darm­stadtium110Ds​[281] Roent­genium111Rg​[282] Coper­nicium112Cn​[285] Nihon­ium113Nh​[286] Flerov­ium114Fl​[289] Moscov­ium115Mc​[290] Liver­morium116Lv​[293] Tenness­ine117Ts​[294] Oga­nesson118Og​[294] Lan­thanum57La​138.91 Cerium58Ce​140.12 Praseo­dymium59Pr​140.91 Neo­dymium60Nd​144.24 Prome­thium61Pm​[145] Sama­rium62Sm​150.36 Europ­ium63Eu​151.96 Gadolin­ium64Gd​157.25 Ter­bium65Tb​158.93 Dyspro­sium66Dy​162.50 Hol­mium67Ho​164.93 Erbium68Er​167.26 Thulium69Tm​168.93 Ytter­bium70Yb​173.05   Actin­ium89Ac​[227] Thor­ium90Th​232.04 Protac­tinium91Pa​231.04 Ura­nium92U​238.03 Neptu­nium93Np​[237] Pluto­nium94Pu​[244] Ameri­cium95Am​[243] Curium96Cm​[247] Berkel­ium97Bk​[247] Califor­nium98Cf​[251] Einstei­nium99Es​[252] Fer­mium100Fm​[257] Mende­levium101Md​[258] Nobel­ium102No​[259] Primordial  From decay  Synthetic Border shows natural occurrence of the element Standard atomic weight Ar, std(E) Ca: 40.078 — Abridged value (uncertainty omitted here) Po: [209] — mass number of the most stable isotope s-block f-block d-block p-block