In 1990 there were approximately 7 × 106 people living in new york city. new york city has an area of approximately 8.31 × 102 square kilometers. what was the population density of new york city in 1990? answer in units of people/km2

Examine the false statement. compounds are the smallest unit of an element that occur most commonly in nature. select the rewording of the statement that is true. a: atoms are the smallest unit of an element that commonly occur in nature. b: molecules are the smallest unit of an element or compound that commonly occur in nature. c: molecules are the smallest unit of a compound that occur on the periodic table. d: compounds are the smallest unit of an element that occur on the periodic table