2.1 Ionic Compounds Flashcards
Ionic Compound:
A compound that is made up of one or more positive metal ions (cations) and one or more negative non-metal ions (anions)
Ionic Bond:
The simultaneous strong attraction of
positive and negative ions in an ionic compound
properties of ionic compounds:
Hard and _____ (bonds resist being _______)
brittle; stretched
properties of ionic compounds:
Relatively ____ melting and boiling points due to
____ electrostatic forces between ions
high; strong
properties of ionic compounds:
______ electricity as molten liquids but not as _____
Conduct; solids
properties of ionic compounds:
Conduct _______ when ____ in water
electricity; dissolved
why are ionic compounds brittle?
Lattice structures are rigid and therefore ionic
compounds are brittle (they will easily fracture
when an external force is applied)
When the lattice structure is dislocated,
positive ions may be closer to each other,
creating repulsive forces, causing fractures
A substance that forms a solution that conducts electricity is called…
an electrolyte
why are compounds (such as table salt) that conduct electricity in solution known as electrolytes?
because they are free-floating ions, that carry
electric charges through the water. (what
happens when electricity is passed through a
solution).
Ions arrange themselves into crystals, forming a
_______ structure, where all of the ions are at
____ locations
crystal lattice; fixed
Not all ionic crystals will form ____ structures
cubic
in the formation of ionic compounds, when the atoms are the same size _____ _____ form
cubic structures
Different sized ___ pack to form different
shapes
ions
Formula unit:
The smallest repeating unit in an ionic crystal.
what would the formula unit be for sodium chloride?
the formula unit for sodium chloride
would be NaCl, or one atom of sodium next to an
atom of chlorine
