chemistry 2 Flashcards
attributes of non metals
Gas, Liquid, or Solid; Brittle when solid; poor conductors
attributes of Metals
Lustrous, malleable, ductile, good conductors
Attributes of Metalliods
seperate the other 2 from B-At and Ge-Po and are a mixture of the two
Alkali Metals
found in group 1 excluding hydrogen, highly reactive, low everything else
Alkaline Earth Metals
Group 2 highly reactive, low everything else
Transition Metals
Group 3-12 good conductors and maluable, Have more than one ion charge
Make colored compounds
Metalloid
Elements B- At ; Ge-Po
Post Transition Metals
bottom half of 13-16, Have more than one ion charge
Halogens
Group 17 highly Reactive
Noble Gasses
Group 18+ Hydrogen, Inert
Inner Transition Metals
Lanathanoid/Actinoids, Usually found together in nature
Have high melting points
Actinides are all radioactive, Make colored compounds
Ionic Size
Positive Electrons lose electrons= Smaller
Negative Electron Gain Electron= Bigger
Meneleev
Periodicity(1869)
Moseley
Atomic Numbers(1911)
Mendeleevs Periodic Law
Properties of the elements recur in regular cycles (periodically) when the elements are arranged in order of increasing atomic mass.