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Physical Science 1

TermDefinition
Atom Smallest piece of matter that still retains the property of the element
Nucleus Surrounded by a cloud containing electrons
Proton Particles with an electrical charge of 1+
Neutron Neutral particles that do not have an electrical charge
Electron Particles with an electrical charge of 1-
Quark Protons and neurons, however, are made up of smaller particle called Quarks
Electron Cloud The area around the nucleus of an atom where its electrons are most likely found
Atomic Number The number of protons in an atom is equal to a number called the atomic number
Average Atomic Mass The weighted-average mass of the mixture of its isotopes
Electron Dot Diagram The symbol of the element and dots to represent the electrons in the outer energy level
Group The vertical columns in the periodic table
Isotope Atoms of the same element that have different numbers of neutrons
Mass Number The sum of the number of protons and the number of neutrons in the nucleus of an atom
Period Horizontal rows of elements on the periodic table
Periodic Table Elements are arranged by increasing atomic number and by changes in physical and chemical properties
Created by: jborrayo
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