The Periodic Table
The Periodic Table
- 105 elements in total
- 93 are stable and non-reactive with oxygen (O2) or water (H2O)
- Classification by electron configuration
- Atomic numbers in sequence
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Elements for Engineering Use
Eliminate:
- Rare Earths (non-stable)
- Actinides (radioactive)
- Gases and Liquids
- Semi-metals
35 Important Engineering Elements:
- Light Metals (Magnesium, Mg; Titanium, Ti; Aluminum, Al;
Beryllium, Be; Lithium, Li)
- Rare Earths (Scandium, Sc; Yttrium, Y; Tantalum, Ta; Rubidium, Ru; Radium, Rd;
Rhenium, Re; Osmium, Os; Iridium, Ir; Cadmium, Cd; Indium, In;
Thallium, Tl)
- Steel Additives (Vanadium, V; Chromium, Cr; Manganese, Mn; Cobalt, Co; Nickel, Ni)
- Nuclear Metals (Zirconium, Zr; Hafnium, Hf)
- Ferrous Alloys (Iron, Fe, not used in pure form due to oxidation and corrosion)
- Pure Copper, Cu (Used in electrical applications, bronzes, and brasses)
- Pure Zinc, Zn (Low melting point, brittle)
- Refractory Elements (Niobium, Nb; Molybdenum, Mo; Tungsten, W; Tantalum, Ta)
- Precious Metals (Palladium, Pd; Platinum, Pt; Gold, Au; Silver, Au)
- Corrosion Resistance (Tin, Sn, for plating)
- Joints (Lead, Pb, is ductile and malleable)
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