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23 Cards in this Set

  • Front
  • Back
1.atom
the smallest unit of an element
2.chemical bond
an attractive force that holds atoms together in a compound
3.chemical change
produces new substances with new properties
4.chemical energy
The change in the internal potential energy due to a chemical reation
5.chemical equation
–a shorthand way of describing a chemical reaction
6.chemical reaction
– the process of chemical change in which different chemical substances are
created by forming or breaking chemical bonds
7.compound
combinations of two or more elements that can be broken down into simpler
substances by a chemical reaction
8.covalent bond
chemical bond formed when ions are shared
9.covalent compound
– molecular compound composed of electrically neutral bound together by
the sharing of electrons
10.double bond
covalent bond formed when two pairs of electrons are shared
11.electronegativity
the electron-pulling ability of an atom in a bond
12.element
basic substances that cannot be broken down into anything simpler
13.formula
using symbols to tell what elements are in a compound and in what proportions
14.ionic bond
chemical bonds that are formed when atoms transfer electrons to become ions
15.ionic compounds
substances containing ionic bonds that form crystalline structures
16.molecule
the smallest unit of a compound, or a gaseous element, that can exist and still retain
the characteristic properties of a substance
17.octet rule
atoms gain or lose electrons to acquire the noble gas structure of eight electrons in
the outer orbital
18.polar covalent bond
covalent bond in which the electrons are shared unequally
19.products
new substances produced from a chemical reaction; written on the right side of an
equation
20.reactants
substances that are changed in a chemical reaction; written on the left side of an
equation
21.single bond
covalent bond formed when only one pair of electrons are shared
22.triple bond
covalent bond formed when three pairs of electrons are shared
23.valence electrons
the electrons in the outermost orbital of an atom