Ionic and Metallic Bonding Flashcards
What is ionic bonding?
when oppositely charged ions are strongly attracted to one another by electrostatic forces
- involves metal and a non-metal
Metal _______ electrons
lose
Non- metals ________ electrons
gain
what is an ionic compound?
giant structures of ions
What are ionic compounds held by?
strong electrostatic forces of attraction between oppositely charged ions. These forces act in all directions in the lattice and this is called ionic bonding.
what is an ionic lattice?
a regular, repeating arrangement
Why is an ionic lattice formed?
The lattice is formed because the ions attract each other and form a regular pattern with oppositely charged ions next to each other.
What are the properties of ionic compounds?
- have high melting and boiling points
- do not conduct electricity when solid, because the ions cannot move
- do conduct electricity when molton or in solution, because the charged ions are free to move about and carry their charge
What do metals consist of?
giant structures of atoms arranged in a regular pattern.
How are the electrons like in metallic bonding?
The electrons in the outer shell of metal atoms are delocalised and so are free to move through the whole structure.
What do declocalised electrons produce?
a lattice of positive ions held together by electrostatic attraction to the delocalised electrons
what is a metallic bond?
the attraction between the positive ions and the delocalised negatively charged electrons
Why do most metals have high melting and boiling points?
the electrostatic attraction between the positive ions and the delocalised electrons are so strong
Why are metals good thermal electrical conducts?
because they have delocalised electrons can move around freely and transfer energy through the metal
Why can metals be bent and shaped?
because they are arranged in layers
