network number - definition. What is network number
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%ما هو (من)٪ 1 - تعريف

BROADCAST BY ONE OR MORE BASE STATIONS TO IDENTIFY A CELLULAR NETWORK IN A CERTAIN AREA (USUALLY CONTIGUOUS)
Network Identification Number; Network identification number; System Identification Number

network number      
Self number         
A NATURAL NUMBER THAT CANNOT BE WRITTEN AS THE SUM OF ANY OTHER NATURAL NUMBER N AND THE INDIVIDUAL DIGITS OF N
Colombian number; Columbian number; Self-number; Self prime; Devlali number
In number theory, a self number or Devlali number in a given number base b is a natural number that cannot be written as the sum of any other natural number n and the individual digits of n. 20 is a self number (in base 10), because no such combination can be found (all n < 15 give a result less than 20; all other n give a result greater than 20).
Atomic number         
  • An explanation of the superscripts and subscripts seen in atomic number notation. Atomic number is the number of protons, and therefore also the total positive charge, in the atomic nucleus.
  • Russian chemist [[Dmitri Mendeleev]], creator of the periodic table.
  • [[Henry Moseley]] in his lab.
  • [[Niels Bohr]], creator of the [[Bohr model]].
NUMBER OF PROTONS FOUND IN THE NUCLEUS OF AN ATOM
Atom number; Atomic numbers; Atomic Number; Proton number; Z (Atomic number); Z (atomic number); Number of protons; Nuclear charge number

The atomic number or nuclear charge number (symbol Z) of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei, this is equal to the proton number (np) or the number of protons found in the nucleus of every atom of that element. The atomic number can be used to uniquely identify ordinary chemical elements. In an ordinary uncharged atom, the atomic number is also equal to the number of electrons.

For an ordinary atom, the sum of the atomic number Z and the neutron number N gives the atom's atomic mass number A. Since protons and neutrons have approximately the same mass (and the mass of the electrons is negligible for many purposes) and the mass defect of the nucleon binding is always small compared to the nucleon mass, the atomic mass of any atom, when expressed in unified atomic mass units (making a quantity called the "relative isotopic mass"), is within 1% of the whole number A.

Atoms with the same atomic number but different neutron numbers, and hence different mass numbers, are known as isotopes. A little more than three-quarters of naturally occurring elements exist as a mixture of isotopes (see monoisotopic elements), and the average isotopic mass of an isotopic mixture for an element (called the relative atomic mass) in a defined environment on Earth, determines the element's standard atomic weight. Historically, it was these atomic weights of elements (in comparison to hydrogen) that were the quantities measurable by chemists in the 19th century.

The conventional symbol Z comes from the German word Zahl 'number', which, before the modern synthesis of ideas from chemistry and physics, merely denoted an element's numerical place in the periodic table, whose order was then approximately, but not completely, consistent with the order of the elements by atomic weights. Only after 1915, with the suggestion and evidence that this Z number was also the nuclear charge and a physical characteristic of atoms, did the word Atomzahl (and its English equivalent atomic number) come into common use in this context.

ويكيبيديا

System identification number

A system identification number (SID) is broadcast by one or more base stations to identify a cellular network in a certain area (usually contiguous). It is globally unique within AMPS, TDMA or CDMA networks (the first two systems are essentially obsolete). This number sometimes has conflicts (see IFAST).