Matching Pairs Periodic Table VocabularyOnline version Use what you learned from your vocabulary flashcards. by Ali Rayfield 1 Atomic Mass 2 Bohr model 3 Atom 4 Element 5 Proton 6 Atomic Number 7 Electron 8 Period 9 Neutron 10 Group A subatomic particle located on energy levels that has a negative charge. The average mass of the protons plus the neutrons in an atom's nucleus. 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 smallest unit a substance can be divided into and still hold the properties of that substance. A basic visual of a single atom with protons, neutrons, and electrons on energy levels. This model was designed by Neils Bohr. The number of protons and the number of electrons found in one atom of an element. 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 neutral, or no, charge.
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