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The Atom

TermDefinition
Atom The basic particles from which all elements are made; the smallest particle of an element that has the properties of that element.
Electron A tiny, negatively charged particle that moves around the outside of the nucleus of an atom.
Nucleus The central core of an atom which contains protons and neutrons
Proton Small, positively charged particles that are found in the nucleus of an atom.
Energy Level A region of an atom in which electrons of the same energy are likely to be found.
Neutron A small particle in the nucleus of the atom, with no electric charge.
Atomic Number The number of protons in the nucleus of an atom.
Isotope An atom with the same number of protons and a different number of neutrons from other atoms of the same element.
Mass Number The sum of protons and neutrons in the nucleus of an atom.
Atomic Mass The average mass of all the isotopes of an element.
Periodic Table an arrangement of the elements showing the repeating pattern of their properties.
Chemical Symbol A one or two letter representation of an element.
Period A horizontal row of elements showing the repeating pattern of their properties.
Group Elements in the same vertical column of the periodic table; also called family.
Created by: alec123567
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