At the heart of chemistry is the , the smallest unit of an element that retains its properties.
: Most elements are metals (shiny, conductive), while non-metals (dull, insulators) are clustered on the right side. 3. Making Connections: Chemical Bonding Chemistry For Dummies
: A "partnership" where two non-metals share electrons to fill their outer shells. Whole of AQA GCSE Chemistry paper 1 in 1hr 15 mins At the heart of chemistry is the ,
: Elements in the same column have similar chemical "personalities" because they have the same number of outer-shell electrons. while non-metals (dull