peridoic table Flashcards
lern
alkaline earth matels
2 electrons outermost shell. group 2, reactive but slower than group 1, less heat produced.
lanthanides
group does not fi typical periodic table type , metals are silvery white, tarnish on contact with air.
actinides
only thorium and uranium exist naturally on earth radioactive unstable nucleus in atom.
transition metals
hard but malleable, shiny, good conductivity .
post transition metals
moving towards non meats world softer conduct poorly metals.
metalloids
movinbg to non meats conductors poor meats
non mealtls
starcase reactive with metals carbon nitrogen oxegen.
halogens
group 7 chemically reactive pair up with alkail meats to make salts.
noble gases
inert gaess group 8 colorless odourless non reactive by nature claming effect light.