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UNIT 1 VOCAB

15 unit 1 vocabulary words

TermDefinition
Model A pattern,plan,representation
Atom The smallest unit of everything
Nucleus The center of an object
Proton A subatomic particle that has a positive charge.
Neutron A subatomic particle that has no charge.
Electron A subatomic particle that has a negative charge.
Atomic number the number of protons found in the nucleus of an atom.
Atomic symbol/nuclear symbol/Chemical Symbol Standard nuclear notation shows the chemical symbol, the mass number and the atomic number of the.
Subatomic particle Particle smaller than atoms.
Molecule Two or more atoms held together by a chemical bond.
Lewis Structure Lewis structures are diagrams that show the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.
Bhor Model This model of the atom depicts positively charged nucleus surrounded by electrons that travel in a circular motion.
Electron Shell An orbit followed by electrons around an atom's nucleus.
Valance Electron An electron that is associated with an atom, and that can participate in the formation of a chemical bond.
Matter Something that occupies space.
Created by: jeffreyappiah