attacked by acids

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• Hard-surface cleaner — Hard surface cleaners is a category of cleaning agents comprising mainly aqueous solutions of specialty chemicals that vary with the amount of dirt and the surface being cleaned.[1] Contents 1 All purpose cleaners 2 Glass cleaners 3 Metal… …   Wikipedia

• Ruthenium — (pronEng|ruːˈθiːniəm) is a chemical element that has the symbol Ru and atomic number 44. A rare transition metal of the platinum group of the periodic table, ruthenium is found associated with platinum ores and used as a catalyst in some platinum …   Wikipedia

• Bélmez Faces — The Bélmez Faces or the Faces of Bélmez is considered by some parapsychologists the best documented and without doubt the most important paranormal phenomenon [in the 20th] century . [ [http://www.discoverychannel.com.au/paranormal/most… …   Wikipedia

• Iron(III) oxide — Iron(III) oxide …   Wikipedia

• Chromium(III) oxide — Chromium(III) oxide …   Wikipedia

• beryllium — /beuh ril ee euhm/, n. Chem. a steel gray, bivalent, hard, light, metallic element, the salts of which are sweet: used chiefly in copper alloys for better fatigue endurance, in springs, and in electrical contacts. Symbol: Be; at. wt.: 9.0122; at …   Universalium

• Hafnium — lutetium ← hafnium → tantalum Zr ↑ Hf ↓ Rf …   Wikipedia

• Chrysotile — Not to be confused with Chrysolite. Chrysotile Chrysotile serpentine from the Salt River area, Arizona General Category …   Wikipedia

• Indium(III) sulfide — Other names indium sesquisulfide, diindium trisulphide Identifiers CAS number …   Wikipedia

• Conservation of ivory — Ivory carving is a decorative art or craft practised since prehistoric times. Its conservation is concerned particularly with the environmental causes of deterioration. Contents 1 Ivory 2 Deterioration 3 Technical examination …   Wikipedia

• rhodium — Symbol: Rh Atomic number: 45 Atomic weight: 102.905 Silvery white metallic transition element. Found with platinum and used in some platinum alloys. Not attacked by acids, dissolves only in aqua regia. Discovered in 1803 by W.H. Wollaston …   Elements of periodic system