Krypton: Non-metal, inert gas Zirconium:Metal, Transittion metal Magnesium: Metal, Alkaline Earth metal Chlorine: non-metal, halogen Arsenic: semi-metal a.k.a metaloid Helium: non-metal, inert gas Oxygen: non metal Copper: metal, transition metal Silicon: non metal, metaloid Aluminium: Metal, post-transition metal Hope that helps.
