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Ionic Compounds

Chemical bond -the force that holds two atoms together -formed by the attraction of positive and negatives
How do atoms form an octet? -octect: full outer energy level
What is a cation? How does it form? What types of elements lose electrons? -cation: a positively-charged atom -forms when atoms lose electrons -metals lose electrons
What is an anion? How does it form? What types of elements lose electrons? -anion: a negatively charged atom -forms when electrons gain electrons -nonmetals gain electrons
The electrostatic force that holds oppositely charged particles together in an ionic compound is an: ionic bond
What is an ionic compound? compounds that contain ionic bonds
Binary compounds contain: a cation and an anion (ex: NaCl)
Charge of group 1 +1
Charge of group 2 +2
Charge of group 13 +3
Charge of group 14 +4
Charge of group 15 -3
Charge of group 16 -2
Charge of group 17 -1
Charge of group 18 no charge
What is a crystal lattice? -the repeating pattern of particle packing in an ionic compound -shap and pattern may vary based on ions
Properties of ionic substances -high melting/boiling point -solid at roomn temperature -brittle -molten solids conduct electricity 0awueous solutions conduct electricity -one particle is referred to as a formula unit
Why do molten or aqueous solutions conduct electricity? -in a solution of molten ions of an ionic bonds break apart (dissociation) -solids can't conduct electricity because they have bonds intact
Endothemric -take in heat
Exothermic -release heat
The formation of ionic compounds from positive and negative ions is always Exothermic
What is a formula unit? -the very simplest ratio of ions in an ionic compound
What is a monotomic ion? -elements when you can get their charge off of the periodic table
How to write a formula for a binary ionic compound -name the metal -name teh nonmetal, change ending to -ide
Created by: mma129