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Atoms

Chemistry

TermDefinition
Atom The basic particle 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 move around the outside of the nucleus of an atom.
Nucleus The center 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 electrical 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 two 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 in the periodic table.
Group Elements in the same vertical column of the periodic table; also called a family.
Created by: AngelitaP15
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