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.
Antigua Guatemala is a city in the central highlands of Guatemala famous for its well-preserved Spanish Baroque-influenced architecture as well as a number of ruins of colonial churches. It served as the capital of the Kingdom of Guatemala. It has been designated a UNESCO World Heritage Site. Antigua Guatemala serves as the municipal seat for the surrounding municipality of the same name. It also serves as the departmental capital of SacatepÃ©quez Department.