Relacionar Columnas Periodic Table VocabularyVersión en línea Use what you learned from your vocabulary flashcards. por Ali Rayfield 1 Neutron 2 Bohr model 3 Proton 4 Element 5 Period 6 Atom 7 Atomic Number 8 Electron 9 Group 10 Atomic Mass A subatomic particle located in the nucleus with a neutral, or no, charge. The average mass of the protons plus the neutrons in an atom's nucleus. A subatomic particle located on energy levels that has a negative charge. The horizontal rows found on a periodic table. A vertical column on the periodic table. It is also known as a family. A subatomic particle located in the nucleus with a positive charge. A basic visual of a single atom with protons, neutrons, and electrons on energy levels. This model was designed by Neils Bohr. The smallest unit a substance can be divided into and still hold the properties of that substance. A substance made of one type of atom found on the periodic table. These substances make up everything in the universe. The number of protons and the number of electrons found in one atom of an element.