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.
In 1865, John J. was enrolled in a local select school for intelligent youth and later continued on to secondary school. Upon graduation in 1878, Pershing began teaching at a school for African American youth in Prairie Mound. Between 1880-1882, he continued his education at the State Normal School during summers.