bonding, structure and properties of matter

• what is different about the number of protons and electrons in a charged ion?

  different number of electron meaning the atom has an overall charge
• what is covalent bonding ?

  the bonding of two non-metals - they share a pair of electrons
• what is metallic bonding and how does it work ?

  metal - metal bonding

  strong electrostatic attraction between posotive metal ions and negative and shared negative electrons
• why are alloys harder than pure metals?

  they are a mixture with different sized atoms, this prevents sliding
• what are the properties of a metal?

  .conduct heat

  .conduct electricity

  .malleable

  .solid at room temp