Studied by 8 people
what kind elements usually form ionic bonds?
a metal and a nonmetal
what happens in an ionic bond?
a transfer of electrons
how is an ionic bond held?
electrostatic attraction
what does a superscript usually show?
the charge of an atom
what does a subscript show?
the number of atoms in a formula
what kind of elements form metallic bonds?
metals
solubility
a degree to which a substance dissolves to make a solution (dissolves in water)
malleability
quality of something that can be shaped into something else without breaking
ductility
ability of a material to be drown or plastically deformed without fracture (to be stretched into a wire)
conductivity
measure of which a material can pass through a current
brittle
property of a material that fractures when subjected to stress (breaks easily)
melting point
temp where a solid melts
boiling point
temp at which a liquid boils and becomes vapor
what types of elements form covalent bonds?
nonmetals
what happens in a covalent bond?
sharing of electrons
how do you find the central atom of a covalent bond?
lowest electronegativity
what is the strongest bond in a covalent bond?
triple bond
what are the common exceptions to the octet rule?
phosphorus and sulfur (3rd period)
what is resonance?
when more than one lewis structure can be drawn for a molecule
how do you calculate a formal charge?
total valence electrons - # of dots - # of lines
what are polyatomic ions?
two or more atoms covalently bonded together that collectively have a charge
what is the VESPR theory?
Valence Shell Electron Pair Repulsion Theory, helps determine the shape of molecules
What is electron geometry?
location of valence electrons within a compound (regions)
What is molecular geometry?
location of atoms within a molecule (based on # of regions and lone pairs)
Note
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