- Puntarenas (Spanish pronunciation: [puntaˈɾenas]) is a city in the Puntarenas canton of Puntarenas Province, on the Pacific coast of Costa Rica. As the seat of the Municipality of Puntarenas canton, it is awarded the title of city, which is made from the Puntarenas, Chacarita and El Roble districts. And as the city of the first canton of the province, it is the capital city of the Puntarenas Province as well, according to the Administrative divisions of Costa Rica.
- Bohr model (Wikipedia)
In atomic physics, the Bohr model or Rutherford–Bohr model is an obsolete model of the atom, presented by Niels Bohr and Ernest Rutherford in 1913. It consists of a small, dense nucleus surrounded by orbiting electrons. It is analogous to the structure of the Solar System, but with attraction provided by electrostatic force rather than gravity, and with the electron energies quantized (assuming only discrete values).