Covalent Bonding And Ionic Compounds Flashcards
What type of atoms do covalent bonds form between
Non metal
When does a covalent bond form
When two positive nuclei are held together by their common attraction for a shared pair of electrons
Name the 7 diatomic molecules
Hydrogen Nitrogen Oxygen Fluorine Chlorine Bromine and iodine
What are the different shapes of simple covalent bonds
Linear, angular, trigonal pyramidal, tetrahedral
How would u describe covalent molecular substances
They have strong covalent bonds within the molecules and only weak attractions between the molecules
They have low boiling points
They do not conduct electricity because they don’t have charged partials that are free to move
Although they may dissolve in other solvents what are molecular substances insoluble in
Water
How would you describe a covalent network structure
They have a network of very strong bonds within one giant structure
They have a very high melting and boiling point
They do not dissolve
Why don’t covalent network substances conduct electricity
Because they don’t have charged particles which are free to move
Why do covalent molecular substances have such low melting and boiling points
Because only weak forces of attraction between the molecules are broken when a substance changes state
Why do covalent network structures have such high melting and boiling points
Because the network of strong covalent bonds is not easily broken
When are ions formed
When atoms lose or gain electrons to obtain the stable electron arrangement of a Nobel gas
When metal atoms lose electrons what type of ions do they form
They form positive ions
When non metal atoms gain electrons what type of ions do they form
Negative ions
Do metal atoms lose or gain electrons
They lose electrons
Do non metal atoms lose or gain electrons
They gain electrons
