Which element, atomic number 30, is often used in sunscreen in the form of its oxide?

Bob Cousy starred for which NBA team from 1950 to 1963? In 2004, which Atlanta-based wireless company acquired AT&T Wireless to become the largest U.S. carrier? Which Union general captured Atlanta in September 1864 and burned much of it before his March to the Sea? What term describes the region of the atmosphere above a nation's territory, over which it claims sovereignty? Which element, named after a famous physicist, has atomic number 100? Complete the saying: "Attack is the best form of ___." Attempting to beat the fictional Phileas Fogg, which reporter went around the world in 72 days in 1889-90? Searches for the ill-fated 1840s expedition of Sir John Franklin proved the existence of which sea route?