Ionic Bonds. Building Science Champions. Objectives. Explain the differences between an atom and an ion. Describe how an ionic bond forms. Identify the properties of ionic compounds. Key terms. Ion Ionic bonds Polyatomic ion Crystal . Electron Transfer.
Building Science Champions
A plus charge represent elements/compounds that have lost an electron, a negative charge represents elements/compounds that have gained an electron.
A subscript represents the number of that element only.
Na + Cl Na+Cl-
2 chloride ions
Their number of valence electrons. Trying to get 8 valence electrons and by adding them together the magic number of 8 is achieved.
Lose an electron
Gain an electron
They neutralize each other
Ca2+ = calcium ion
CaCO3 = calcium carbonate