Metalloids are metallic-looking brittle solids that are either semiconductors or exist in semiconducting forms, and have amphoteric or weakly acidic oxides. Typical nonmetals have a dull, coloured or colourless appearance; are brittle when solid; are poor conductors of heat and electricity; and have acidic oxides.
(1860-1948).At the age of 56, John J. Pershing became the commander of the American Expeditionary Force that helped to turn the tide in favor of the Allies and against the Central Powers during World War I. For his leadership during the war, he was promoted to the rank of general of the armies.
Gen. John J. Pershing and World War I, 1917â1918. The desk from General John J. Pershingâs war room, together with a full-size reproduction of the wall map on which he tracked troop movements, form the new landmark display for the Museumâs third floor east. The map shows troop locations on the western front the very day armistice was reached.