Matching Pairs Periodic Table VocabularyOnline version Use what you learned from your vocabulary flashcards. by Ali Rayfield 1 Element 2 Electron 3 Atom 4 Atomic Number 5 Atomic Mass 6 Period 7 Bohr model 8 Group 9 Proton 10 Neutron 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. The number of protons and the number of electrons found in one atom of an element. A subatomic particle located in the nucleus with a neutral, or no, charge. 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. The smallest unit a substance can be divided into and still hold the properties of that substance. The average mass of the protons plus the neutrons in an atom's nucleus. The horizontal rows found on a periodic table. A substance made of one type of atom found on the periodic table. These substances make up everything in the universe.
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