Relier Pairs Periodic Table VocabularyVersion en ligne Use what you learned from your vocabulary flashcards. par Ali Rayfield 1 Element 2 Group 3 Period 4 Atomic Mass 5 Electron 6 Neutron 7 Atomic Number 8 Bohr model 9 Proton 10 Atom The average mass of the protons plus the neutrons in an atom's nucleus. 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. 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. 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 vertical column on the periodic table. It is also known as a family. The horizontal rows found on a periodic table.
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