Joseph Stalin is important to history because during 1929-1953 he was the dictator of the Union of Soviet Socialist Republics (USSR). Under Stalin, the Soviet Union was transformed from a peasant society into an industrial and military superpower. Hope this helps!:)
A lithium atom has 3 protons and 3 electrons. It can lose one of its electrons, making it an ion. It now has more positive protons than electrons so it has an overall positive charge. Therefore it is a positive ion.
