Payton Gwisdala (chapter 8)
Covalent Bonds
atoms that are joined together by SHARING electrons
Example: H2O (water) HCl (hydrochloric)
type of bond shares electrons with another atom
Ionic Compound
Molecular Compound
a compound composed of molecules
molecules of a given molecular compound are all the same
Sodium Chloride and NaCl is NOT molecule
exists as a collection of positively and negatively charged ions arranged in repeating pattens.
are usually combined as a metal and a non-metal
molecular compounds tend to have relatively lower melting and boiling points than ionic compounds.
many molecular compounds are gasses or liquids at room temperature.
bridal, high melting point, high boiling point, desolve in water can conducted in electricity
low boiling point and low melting point
octep rule (go to 8)
Molecular Formula
the chemical formula of a molecular compound
a molecular formula shows how many atoms of each element a molecule contains
Octet Rule
in covalent bonds, electron sharing usually occurs so that atoms attain the electron configuration of noble gases
filling an element by having 2 or 8 valance electrons
elements from the nonmetals and metalloids will combine to form covalent bonds
Polyatomic Ions
atoms that carry a negative or positive charge
more than 1