Date post: | 14-Dec-2014 |
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Ionic BondsMr. JohnstonSaigon South
International School
Overview● How do Ions form?● How are the formulas and Names of
Ionic Compounds written?● What are the Properties of Ionic
Compounds?
Review
Rule = atoms tend to gain, lose or share electrons so as to have 8 electrons✓C would like to ✓N would like to✓O would like to
Gain 4 electrons
Gain 3 electronsGain 2 electrons
IONIC BONDbond
formed between two ions by the transfer of electrons between a metal and non-metal
How do Ions Form?
● When an atom loses ones of its electrons, it becomes a positively charged ion
● When an atom gains an electron, it becomes a negatively charged ion
How are the formulas and names of ionic compounds written?
1). Ionic bond – electron from Na is transferred to Cl, this causes a charge imbalance in each atom. The Na becomes (Na+) and the Cl becomes (Cl-), charged particles or ions. Chlorine becomes “Chloride”
Quick Review:● Which atoms in each picture are giving
and gaining an electron?● Which are now positively charged and
negatively charged?
Properties of Ionic Compounds
Hard, brittle crystals
High Melting Points
They conduct electric current when dissolved in water.