WHAT ARE RADIOISOTOPES ? Many of the chemical elements have a number of isotopes. The isotopes of an element have the same number of protons in their atoms (atomic number) but different masses due to different numbers of neutrons. In an atom in the neutral state, the number of external electrons also equals the atomic number.
Bogota. Colombia's capital of Bogota is in the central part of the country. The city is situated in the Andes mountain chain and is surrounded by five rivers, including the Bogota River.Bogota is considered the educational and cultural center of Colombia.olombia's capital of Bogota is in the central part of the country. The city is situated in the Andes mountain chain and is surrounded by five rivers, including the Bogota River.
Alternative Titles: Estado de Nueva Granada, RepÃºblica de Colombia, Republic of Colombia Colombia, officially Republic of Colombia, Spanish RepÃºblica de Colombia, country of northwestern South America. Its 1,000 miles (1,600 km) of coast to the north are bathed by the waters of the Caribbean Sea, and its 800 miles (1,300 km) of coast to the west are washed by the Pacific Ocean.