Professor: What is the symbol of Barium?
Student: BA
Professor: And the symbol of Sodium?
Student: NA
Professor: What do we get if we mix one atom of Barium and two atoms of Sodium?
Student: BANANA
Professor: What is the symbol of Barium?
Student: BA
Professor: And the symbol of Sodium?
Student: NA
Professor: What do we get if we mix one atom of Barium and two atoms of Sodium?
Student: BANANA