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...The periodic table hl name and objectives atomic structure describe as a list of elements arranged so to demonstrate trends in their physical chemical properties define term element associate first with elemental symbols distinguish between compounds state principle resemblances within each main group particular alkali metals alkaline earth halogens noble gases reaction water lithium sodium potassium having seen demonstrated by means equation outline history idea including contributions greeks boyle davy moseley mendeleev dobereiner newlands modern compare s arrange order relative mass note differences number z using c scale r isotope composition isotopes hydrogen carbon an example calculate masses from abundance given organisation particles atoms numbers classify twenty on basis outer electrons energy level build up electronic derive configurations ions p block only arrangement individual orbitals air fire n robert def is substance that cannot be split into simpler substances put grou...