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classification of matter, ions and atoms,properties of substnaces…

- - - - ionic compound:
        ionic bonding:
        electrons are transferred between toms to create the ions, this makes the compound
        
        compound made up of ions
        (cations + & anions -) ( metal and non-metal)
        
        must have a charge of zero
        
        ions are atoms that have gained/lost electrons,
        to have full, stable outer shells
        
        transfer of valence electrons that creates 2 oppositely charged ions that then bond to create a neutral compound
        
        atraction between 2 oppositey charged ions
        
        forces holding them togeather are stong
      - molecular compound:
        covalent/molecular bonding:
        **electrons are shared** between the atoms through covalent bonds
        
        also known as Covalent compound
        
        formed form 2 or more non-metals
        
        they gain full stable valence shells by sharing electrons
        
        covalent bonds are what holds the compound together
        
        covalent bonds are weak so the compounds are very reactive
        
        molocule shave no charge, so they won't conduct electricity