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Science Vocab. 5

Atom the smallest particle of an element that still retains the properties of the element
Atomic Number number of protons in an nucleus
Average Atomic Mass weighted-average mass of the mixture of an elements isotopes
Electron particles surrounding the center of an atom that have a charge
Electron Cloud area around the nucleus of an atom where the atoms electrons are most likely to be found
Electron Dot Diagram uses the symbol for an element and dots representing the number of electrons in the elements outer energy level
Group vertical column in the periodic table
Isotope atoms of the same element that have different numbers of neutrons
Mass Number sum of the number of protons and neutrons in an atoms nucleus
Neutron neutral particle composed of quarks inside the nucleus of an atom
Nucleus positively charged center of an atom that contains protons and neutrons and is surrounded by a cloud of electrons
Period horizontal row in the periodic table
Periodic Table organized list of all known elements that are arranged by increasing atomic number and by changes in chemical and physical properties
Proton particle composed of quarks inside the nucleus of an atom that has a charge of 1+
Quark particles of matter that make up protons and neutrons
Created by: 51179