Ionic Bonding Flashcards
1
Q
When atom lose electrons….
A
positive ions/ cations are formed
e.g. Na+, Mg2+
2
Q
When atom gain electrons….
A
negative ions/anions are formed
e.g. O2-, Cl-
3
Q
Define ionic bonds
A
strong electrostatic forces of attraction between positive and negative ions
4
Q
Giant Lattice structures of ionic compounds
A
3 dimensional network of ions
ions held in place by ionic bonds
ions packed in regular and repeating pattern
structure held together tightly due to strong attraction of oppositely charged ions
5
Q
Physical properties of Ionic compounds:
THERES 3
A
- HIGH MELTING AND BOILING PTS:
since the forces of attraction between oppositely charged ions are strong, large amt of heat energy required to overcome the forces to melt the compound - SOLUBLE IN WATER, INSOLUBLE IN ORGANIC COMPOUNDS
- CONDUCT ELECTRICITY WHEN MOLTEN/AQ
6
Q
Why ionic compounds conduct electricity when molten or dissolved in water?
A
free moving ions / electrons are required to conduct electricity. In aqueous, cations and anions are free to move and available to conduct electricity.
