atomski broj

atomski broj

The number of protons in an atomic nucleus . The atomic number and the element symbol are two alternate ways to label an element. In nuclide symbols , the atomic number is a leading subscript; for example, in 126C, the "6" is the atomic number.

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Avogadrov broj,, broj atomski 12 grameni carbonu

Astronomy; General astronomy

The number of atoms in 12 grams of carbon 12. The number of atoms in a gram-atom (mass in grams numerically equal to the atomic weight) or the number of molecules in a ...

atomski radijus

Chemistry; General chemistry

One half the distance between nuclei of atoms of the same element, when the atoms are bound by a single covalent bond or are in a metallic crystal. The radius of atoms obtained ...

atomski sat

Physics; Nuclear & particle physics

A highly-accurate clock which measures time by the frequency of electromagnetic radiation produced by a single caesium 133 atom.

koordinacioni broj

Chemistry; General chemistry

The number of bonds formed by the central atom in a metal-ligand complex.

isparljiv

Chemistry; General chemistry

A solid or liquid material that easily vaporizes. A material with a significant vapor pressure .

abraziv

Chemistry; General chemistry

A very hard, brittle, heat-resistant substance that is used to grind the edges or rough surfaces of an object. boron carbide, diamond, and corundum are abrasives.

diastereoizomer, diastereomer

Chemistry; General chemistry

Stereoisomers which are not mirror images of each other. Diastereomers are chemically similar but distinguishable; they have different melting points and boiling points and they ...

medicinska hemija

Chemistry; General chemistry

A branch of chemistry concerned with the discovery, design, synthesis , and investigation of biologically active compounds and reactions that these compounds undergo in living ...

slab elektrolit

Chemistry; General chemistry

A weak electrolyte is a solute that incompletely dissociates into ions in solution. For example, acetic acid partially dissociates into acetate ions and hydrogen ions, so that ...

grafit

Chemistry; General chemistry

An amorphous form of carbon , made of carbon atoms bound hexagonally in sheets (like chickenwire).

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Džon Lenon

John Lennon, (9 October 1940 – 8 December 1980) was a celebrated and influential musician and singer-songwriter who rose to worldwide fame as one of ...