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