atomic number

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Related to atomic number: Isotopes, atomic weight
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  • noun

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the order of an element in Mendeleyev's table of the elements

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References in periodicals archive ?
Phase 4 was identical to Phases 1 and 2, but the stimuli were, "Name an atomic number.
The absorption index is related to the subject thickness, and the composer substance atomic number of the subject.
Scientists identify elements by their atomic number (the number of protons in the element's nucleus).
TABLE 1 shows the differences in the atomic number (Z) and density between the different elements contained in SnPb and Pb-free solders.
If one examines the first and second periods of the periodic table as shown in Table 1, we find that the boundary of filling the first electron in the s, p, d and f shells of each quantum level designated as n is a stable zone that is indicated by a prime atomic number Z (the format in Table 1 is Z: n[Level.
Even elements with a high atomic number can be analyzed with confidence.
Able to detect low atomic number elements with high energy resolution, the system provides improved peak overlap identification for more accurate analysis of materials used during the component manufacturing process, including silver, tin and lead.
Modern numerology, however, gets a little weird on this, reminding us that the atomic number of carbon, the building block of life on this planet is also, you guessed it, six, and that the time-honored euphemism for oral sex, "69," is just another way of drawing the ancient Chinese symbol for the codetermining feminine and masculine principles of the universe: yin and yang.
This new element has no protons or electrons, thus having an atomic number of 0.
This state-of-the-art spectrometer uses a technique in x-ray fluorescence, multi-dispersive XRF, that combines the benefits of the classical techniques of EDXRF and WDXRF to allow high performance, simultaneous measurement to be made on both low and high atomic number elements.
Most ED-XRF analyzers typically measure around 80 elements from atomic numbers as low as sodium (atomic number 11) or magnesium (12) to as high as uranium (92).
The element, tentatively named Administratium (Ad) has no protons or electrons, thus it has an atomic number 0.
An isotope consists of any of two or more forms of an element having the same atomic number, but with different weights, or mass.
It turned out to be element number 91, one of the seven missing elements at the time Moseley had advanced his atomic number concept (see 1914).
The Ion stopping power -- the gradual energy loss of fast particles as they pass through matter -- results in a quadratic increase in the required ion kinetic energy relative to atomic number, but a decreasing number of these ions is needed to deliver the fast ignition hot spot energy, translating into a decreased irradiated spot size on the coupling target.