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inert gas
(Encyclopedia) inert gas or noble gas, any of the elements in Group 18 of the periodic table. In order of increasing atomic number they are: helium, neon, argon, krypton, xenon, and radon. They are…nobelium
(Encyclopedia) nobeliumnobeliumnōbēˈlēəm [key], artificially produced radioactive chemical element; symbol No; at. no. 102; mass no. of most stable isotope 259; m.p. 827℃; b.p. and density unknown;…osmium
(Encyclopedia) osmiumosmiumŏzˈmēəm [key], metallic chemical element; symbol Os; at. no. 76; at. wt. 190.23; m.p. 3,045±30℃; b.p. 5,027±100℃; sp. gr. 22.57 at 20℃; valence usually +0 to +8. Osmium is…Moseley, Henry Gwyn Jeffreys
(Encyclopedia) Moseley, Henry Gwyn JeffreysMoseley, Henry Gwyn Jeffreysmōzˈlē [key], 1887–1915, English physicist, grad. Trinity College, Oxford, 1910. He began his research under Ernest Rutherford…asthma
(Encyclopedia) asthmaasthmaăzˈmə, ăsˈ– [key], chronic inflammatory respiratory disease characterized by periodic attacks of wheezing, shortness of breath, and a tight feeling in the chest. A cough…meitnerium
(Encyclopedia) meitneriummeitneriummītnĭrˈēəm [key], artificially produced radioactive chemical element; symbol Mt; at. no. 109; mass number of most stable isotope 276; m.p., b.p., sp. gr., and…pi
(Encyclopedia) pi, in mathematics, the ratio of the circumference of a circle to its diameter. The symbol for pi is π. The ratio is the same for all circles and is approximately 3.1416. It is of…Deluge
(Encyclopedia) DelugeDelugedĕlˈy&oomacr;j [key], in the Bible, the overwhelming flood that covered the earth and destroyed every living thing except the family of Noah and the creatures in his…darmstadtium
(Encyclopedia) darmstadtium, artificially produced radioactive chemical element; symbol Ds; at. no. 110; mass number of most stable isotope 281; m.p., b.p., sp. gr., and valence unknown. Situated in…clearing
(Encyclopedia) clearing, in banking, the periodic settling of bankers' claims against each other, for which local banks establish clearinghouse associations. Clearinghouses are said to have existed…Trending
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