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Index (N)

NA - NC

ND - NF

NG - NJ

NK - NN

NO - NR

NS - NV

NW - NZ

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The fastest man-made object that ever leave the Earth is the Pinoeer 10 spacecraft, launched in 1972, and attained a speed of more than 32000 mph.


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nascent hydrogen Chem.
A reactive form of hydrogen produced in situ in the reaction mixture. Nascent (newly born) hydrogen can reduce compounds that do not readily react with normal hydrogen gas. The reactive capability of nascent hydrogen is not clear. It is widely thought that it may be in the form of short-live atomic hydrogen. It may also be in the form unstable hydride compound. It may also be possible that normal hydrogen molecules (H2) are indeed form but in excited states that react before they reduce to the ground state as they are released from the reaction mixture. Nascent hydrogen is usually produced by reaction of metals with acids, for example, zinc and sulfuric acid.

natron Min.
natron
A mineral form of the hydrated sodium carbonate, Na2CO3.H2O. It is an opaque white mass and can be easily crushed (hardness = 1). It readily adsorb moisture and is therefore usually found in evaporative, arid area. Natron is used for mummifications in ancient Egypt.

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