atomic number


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Related to atomic number: Isotopes, atomic weight

atomic number

n. Symbol Z Abbr. at. no.
The number of protons in an atomic nucleus.

atomic number

n
(General Physics) the number of protons in the nucleus of an atom of an element. Abbreviation: at. no. Symbol: Z Also called: proton number

atom′ic num′ber


n.
the number of protons in the nucleus of an atom of a given element, used to locate the element in the periodic table. Abbr.: at. no.; Symbol: Z
[1815–25]

atomic number

The number of protons in the nucleus of an atom. In electrically neutral atoms, this number is also equal to the number of electrons orbiting about the atom's nucleus. The atomic number of an element determines its position in the Periodic Table.

atomic number

1. Or proton number (Z) The number of protons in the nucleus of an atom. If not electrically charged, this is equal to the number of electrons in its shells.
2. The number of protons in the nucleus of an atom.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.atomic number - the order of an element in Mendeleyev's table of the elementsatomic number - the order of an element in Mendeleyev's table of the elements; equal to the number of protons in the nucleus or electrons in the neutral state of an atom of an element
number - a concept of quantity involving zero and units; "every number has a unique position in the sequence"
magic number - the atomic number of an extra stable strongly bound atomic nucleus: 2, 8, 20, 28, 50, 82 or 126
Translations
atomové číslo
原子番号
atoomnummer
atomnummer
原子序

atomic number

n (Chem) → numero atomico
References in periodicals archive ?
i] is the atomic number of element i in the compound.
A second positive aspect of low voltage microanalysis is the dependence upon beam energy of the matrix or inter-element effects, atomic number (scattering and stopping power), absorption, and secondary x-ray fluorescence, which must be considered in quantitative analysis.
Some of the other benefits of using beryllium include its thermal stability, which allows it to perform well at temperatures only a few degrees above absolute zero; its low atomic number, which keeps it from becoming radioactive with all of the radiation bombarding it; and, its lack of magnetism, which allows the system of multi-pole magnets to steer and focus the particle beam without interference.
Second Way: Consider the atomic number of each element, shown as a subscript the original squares above and repeated in the arrays below.
The atomic numbers (1-109), the symbols of the chemical elements and their names are given in the list below.
Integrated into each Reveal EDS are advanced threat detection algorithms that balance the sophisticated analysis of material identification using both density and atomic number with the false alarm threshold required to efficiently process passengers.
On the basis of its atomic number, 106, that's exactly where seaborgium belongs.
Z Backscatter works by detecting and outlining "low Z" materials (items that contain low atomic number elements such as carbon, hydrogen, oxygen, and nitrogen).
Uranium, with atomic number 92, is the heaviest naturally occurring element.
Based on the X-ray Compton Scattering effect, Z Backscatter technology works by detecting and highlighting "low Z" materials (items that contain low atomic number elements such as carbon, hydrogen, oxygen, and nitrogen).
With 111 protons and 161 neutrons, this lab-made element has the highest atomic number seen so far.
The system will combine 9 MeV transmission imaging radiography with automatic identification of high atomic number materials such as tungsten, lead, uranium, or plutonium.