C2 Chemistry - ionic bonding, covalent bonding and metallic bonding
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what is an ionic compound?
electrons transferred from metal atoms to non metal atom, forming ions and resulting in ionic compound
what is an ionic bond?
force of attraction between oppositely charged ions
metal ions non-metal ions lose or gain electrons? postive/negative??
metal ions - lose, positively charged non-metal ions - gain, negatively charged
what is covalent bonding?
non-metals share electrons to have a outer shell full of electrons
how many electrons can a metal have on its outer shell?
8
what can be used in covalent bonding: gases liquids solids low melting/boiling point high melting/boiling point conduct electricity dont conduct electricity
gases liquids low melting/boiling points cant conduct electricity
what are noble gases?
elements that have a full outershell
what is metallic bonding?
the atoms in a metal are held together by metallic bonds
what is the attraction in metallic bonding between?
delocalised electrons and metal ions
what are the two properties of metallic bonding?
high melting and boiling points conducting electricity
why do metallic bonding have high M and B points
metallic bonds are very strong and take a long time to break down
why does metallic bonding conduct electricity?
metals carry free electrons around that can move freely