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unit 2 definitions

science

TermDefinition
valance electron the electrons that are in the highest energy level of an atom and that are involved in chemical bonding
electron dot diagram a representation of the valence electrons in an atom, using dots
chemical bond the force of attraction that holds two atoms together
ion an atom or group of atoms that has become electrically charged
ionic bond the attraction between oppositely charged ions
ionic compound A compound that consist of positive and negative ions
poly atomic ions an ion that is made of more than one atom
chemical formula symbols that show the elements in a compound and the ratio of an atom
subscript a number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound
crystal a solid in which the atoms are arranged in a pattern that repeats again and again
covalent bond a chemical bond formed when two atoms share electrons
molecules a neutral group of two or more atoms held together by covalent bonds
metallic bond an attraction between a positive metal ion and the electrons surrounding it.
Created by: MCDUFFIEL1215
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