1 - Principles of chemistry (f,g,h) Bonding comparison
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Are ionic compounds: High or low Melting and boiling points? Why? Soluble (in water)? Why? Conductive? Why?
High melting and boiling points because it has strong electrostatic forces of attraction. Soluble because water can form attractions with ions Conductive when molten or liquid because ions can move and carry current
Are covalent compounds: High or low Melting and boiling points? Why? Soluble (in water)? Why? Conductive? Why?
Low melting and boiling points because it has weak intermolecular forces. Not soluble because water can’t form attractions with ions Not conductive at all because there are no freely moving particles which can carry current
Are metallic compounds: High or low Melting and boiling points? Why? Soluble (in water)? Why? Conductive? Why?
High melting and boiling points because it has strong metallic bonds (strong electrostatic forces of attraction between lattice of positively charged ions and sea of delocalised electrons). Not soluble because water can’t form attractions with ions Conductive because electrons are able to move and carry current.