Bonding Flashcards
What do covalent bonds form between
Non metal atoms
What is a covalent bond
When two positive nuclei are held together by their attraction for a shared pair of electrons
What are the seven diatomic molecules
Hydrogen, nitrogen, oxygen, fluorine, bromine, chlorine, iodine
What are the different structural formulas a covalent bond can have
Linear, angular, trigonal pyramidal or tetrahedral
Describe the attractions between the bonds in a covalent molecular substance
They have strong covalent bonds within the molecules but only weak attractions between the molecules
Describe the m.p. And b.p. Of covalent molecular substances
They have low melting and boiling points as they only have weak forces of attraction between molecules
Do covalent molecular substances conduct electricity
No because they do not have charged particles that are free to move
Describe the bonds within a covalent network
The have a network of strong covalent bonds within one giant structure
Why do covalent networks have high m.p and b.p
Because the network of covalent bonds is not easily broken
True or false covalent networks dissolve
False
Do covalent networks conduct electricity
No because they do not have charged particles that are free to move
When are ions formed
When atoms lose or gain electrons to obtain a stable electron arrangement
What happens to metal atoms during the formation of ions
They lose electrons forming positive ions
What happens to non-metal atoms during the formation of ions
They gain electrons to form negative ions
What is an ionic bond
The electrostatic attraction between positive and negative ions
Why do ionic compounds have high melting and boiling points
Because strong ionic bonds must be broken in order to break up the lattice
Are ionic compounds soluble in water
Yes
When do ionic compounds conduct electricity
When molten or in solution because the lattice structure breaks up allowing the ions to be free to move
What is electrolysis
The decomposition of an ionic compound into its elements using electricity
What kind of atoms does ionic bonding take place between
Metal and non-metal
What is the only covalent network that conducts
Graphite
