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[2] [7] The heat of formation is c. 24 kilocalories (100 kJ) per mol. [7] It is a semiconductor with a reported bandgap of c. 3.2eV, [9] however, a thin zinc nitride film prepared by electrolysis of molten salt mixture containing Li 3 N with a zinc electrode showed a band-gap of 1.01 eV. [10] Zinc nitride reacts violently with water to form ...
While the difficulty of obtaining macroscopic samples of synthetic elements in part explains their high value, there has been interest in converting base metals to gold (Chrysopoeia) since ancient times, but only deeper understanding of nuclear physics has allowed the actual production of a tiny amount of gold from other elements for research ...
Lambert and Butler Profile Cigarettes are thinner in diameter, targeted at the busy smoker, who desires a cigarette which provides the same nicotine level as a standard size cigarette but in a smaller package, making the cigarette quicker to smoke. Fresh Burst and Profile are available in price marked or standard 20 packs. [19] [20]
Platinum nitride and osmium nitride may contain N 2 units, and as such should not be called nitrides. [11] [12] Nitrides of heavier members from group 11 and 12 are less stable than copper nitride (Cu 3 N) and zinc nitride (Zn 3 N 2): dry silver nitride (Ag 3 N) is a contact explosive which may detonate from the slightest touch, even a falling ...
Face value Coin Obverse design Reverse design Composition Mintage Available Obverse Reverse 50¢ Grant Memorial half dollar (no star) Ulysses S. Grant: Birthplace of Ulysses S. Grant 90% Ag, 10% Cu Authorized: 250,000 (max) Uncirculated: 95,055 (P) [7] 1922 50¢ Grant Memorial half dollar (star) Ulysses S. Grant, star between AMERICA and GRANT
On History Channel's hit show "Pawn Stars," a man came in to sell a 1907 Saint-Gaudens double eagle $20 gold coin. The coins are extremely rare, and some of them have sold for more than $1 million ...
Precious metals in the form of coins whose market value is determined by metallic content rather than scarcity. bullion value The current market value of the raw precious metal content of a coin. For example, the bullion value for Canadian silver coins minted between 1920 and 1966 is 12 times the face value when silver is $20.00 per troy ounce.
A pack or packet of cigarettes (also informally called fag packet in British slang; as in the idiom "back of a fag packet" or "fag-packet calculation") is a rectangular container, mostly of paperboard, which contains cigarettes. The pack is designed with a flavor-protective foil, paper or plastic, and sealed through a transparent airtight ...