Answer: Paul Erdős More information: Erdős published at least 1,525 mathematical papers during his lifetime. He engaged more than 500 collaborators and devoted most of his time to mathematics up until his death in 1996 at the age of 83 years old.
Answer: Mercury and Bromine More information: Mercury and Bromine are the only two elements on the periodic table that are liquid at room temperature. These elements are liquids because the intermolecular forces are strong enough so that it does not vaporize.
Answer: Mauna Loa More information: Mauna Loa is located in Hawaii and is one of the five volcanoes that forms the island. The last time Mauna Loa erupted was April 15, 1984.
Answer: NaCl More information: Sodium chloride (also known as salt or halite), is an ionic compound representing a 1:1 ratio of sodium and chloride ions.
