science vocab chapter 9
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Chemical bond
a force that holds two or more atoms together
valence electrons
outermost electron of an atom that aprticipates in chemical bonding
electron dot diagram
model that represents valence electrons in an atom as dots around the elements chemical symbol
covalent bond
chemical bond formed when two atoms share one or more pairs of valence electrons
molecule
group of atoms held together by covalent bonding that acts as an indapendent unit
polar molecule
a molecule that has a partial positive end and a partial negative end because of unequal sharing of electrons
chemical formula
group of chemical symbols and numbers that represent the elements and the numbers of atoms of each element that make a compound
ionic bond
attraction between positively and negatively charged ions in an ionic compound
metalic bond
when many metal atoms share there pulled valence electrons