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Unit 1 Vocabulary

Atoms vocabulary

TermDefinition
Atom the smallest particle of an element
Atomic Number number of protons in the nucleus of the atom, determines the identity of the atom
Avogadro’s Number the number of particles found in one mole of a substance with an experimentally determined value of approximately 6.0221 x 1023 particles per mole
Dimensional Analysis (aka factor-label method) versatile mathematical approach that can be applied to computations ranging from simple unit conversions to more complex, multi-step calculations involving several different quantities
Element substance that is composed of a single type of atom; a substance that cannot be decomposed by a chemical change; determined by the number of protons in the atom
Ion an atom or group of atoms in which the number of electrons is different from the number of protons, causing a positive or negative charge
Ionization process of an atom gaining or losing electrons to become an ion
Isotope atoms that contain the same number of protons but different numbers of neutrons, resulting in atoms of the same element having different masses
Mole amount of substance containing the same number of atoms, molecules, ions, or other entities as the number of atoms in exactly 12 grams of 12C
Particle any basic unit of matter and energy such as atoms, ions, molecules, formula units, etc.
Created by: user-1700993
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