chemistry B Flashcards
what is ionic bonding?
ionic bonding is between oppositely charges ions.
what is covalent bonding?
covalent bonding is between two non-metal ions.
what is metallic bonding
metallic bonding is the electrostatic attraction between positive metal ions and delocalised electrons.
what is the diagram called that represents the sharing of electrons?
dot and cross diagram
what is the boiling point and melting point of ionic compounds?
they have high melting and boiling points
does metallic bonds conduct electricity and why?
yes because they have delocalised electrons that are free to carry a charge.
does covalent bonding conduct electricity and why?
they don’t conduct conduct as there are no free electrons to carry a charge.
what is meant by the term malleable?
the metals can be moulded, bent and shaped without shattering
what is meant by the term ductile ?
the ability of a material to be stretched, pulled, or drawn into a thin wire or thread without breaking
explain the ionic bond between MgCl and the outcome
the magnesium is the metal and the chlorine if the non-metal. The magnesium looses an electron from its outer-shell so that chlorine can gain a full outer-shell. This means that magnesium will gain a positive charge and chlorine will gain a negative charge.
what is a giant ionic structure?
molecules made of a large number of metal and non-metal ions joined by ionic bonds
what is a giant covalent structure and give an example ?
where a large number of atoms are joined by covalent bonds
Example: diamond and graphite
why can ionic compounds conduct when molten but now when solid?
this is because the ions are now free to move within the solution and they are no longer stuck in a fixed state.
explain the covalent bond between Cl and O
The oxygen and the chlorine will share a pair of electrons
compare the structure of simple covalent and giant covalent
differences:
- simple = low melting and boiling point
-giant= high melting and boiling point
