Mendeleev created the first periodic table based on atomic weight. He observed that many elements had similar properties, and that they occur periodically. Hence, the table's name. His periodic law states that the chemical and physical properties of the elements vary in a periodic way with their atomic weights.
Location of Guatemala City on a map. Guatemala City is the capital city of Guatemala. It has a population of 994,938, and is located on a latitue of 14.64 and longitude of -90.51. Guatemala City is also the political center of Guatemala, which is considered a Republic, and home to its Executive head of state.
Guatemala is a country in Central America bordering the Northern Pacific Ocean, the Gulf on Honduras, El Salvador, Mexico, Honduras, and Belize. Two mountain chains enter Guatemala from west to east, with a small desert, sand dunes and hills in between. The government system is a constitutional democratic republic.