A Manual of Metallurgy

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: Order 2. Seven metals which decompose water at a red heat: ? Metals. Symbol. Equivalent. 1. Iron . Fe 28 2. Manganese . . . Mn 27.5 3. Nickel . Ni 29.5 4. Cobalt ... Co 29.5 5. Tin ... Sn 59 6. Zinc . . . Zn 32.7 7. Cadmium . . . Cd 56 Order 3. Eleven metals which decompose water at ordinary temperatures;...
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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: Order 2. Seven metals which decompose water at a red heat: ? Metals. Symbol. Equivalent. 1. Iron . Fe 28 2. Manganese . . . Mn 27.5 3. Nickel . Ni 29.5 4. Cobalt ... Co 29.5 5. Tin ... Sn 59 6. Zinc . . . Zn 32.7 7. Cadmium . . . Cd 56 Order 3. Eleven metals which decompose water at ordinary temperatures; although, in the case of some few of these, a slight rise of temperature, or else the addition of some weak acid, becomes necessary. Metals. Symbol.Equivalent.1. Magnesium . . . Mg 2. Cerium Ce 3. Lanthanum . . . Ln 4. Didymium D 5. Yttrium Y 6. Erbium ? 7. Terbium . . . ? 8. Glucinium Gl 9. Aluminium Al 10. Thorinum . . . Th 11. Zirconium Zr12 4648 ? 32 4.7 13.7 39.5 33.6Order 4. Six metals which decompose energy, even at low temperatures: ?water withMetals. Symbol.Equivalent.1. Potassium .' . . K 2. Sodium . . . Na 3. Lithium . .Li 4. Barium . . Ba 5. Strontium Sr 6. Calcium Ca39 237 68.5 43.8 20A metal may be defined as a solid elementary body, which conducts heat and electricity through its substance perfectly, and has a peculiar condition of surface, whereby light is strongly reflected from it; and hence its surface is more or less lustrous. The latter character is generally so strongly marked that, in speaking in common language of any lustrous body, we say it has a metallic lustre. It seems to be the result of perfect opacity, by which all rays are reflected from the surface; for, if we take finely divided gold or silver, we observe it to be a dull, sandy-looking body, yellow in the former, and gray in the latter case; but the least condensation by rubbing with the smooth face of a hammer or a burnisher, will produce the necessary state of surface for this reflection of light. The metals are nearly all perfectly opaque, even in thin le...