Are there any online tools or databases that provide information about the atomic numbers of elements?

The atomic number is equal to the number of protons in an atom's nucleus. Hydrogen's atomic number is 1 because all hydrogen atoms contain exactly one proton. The atomic number equals the charge on the nucleus. It therefore also equals the number of protons in the nucleus and also equals numerically the number of ... Abstract. Spectral CT imaging (multi-energy detection) is a promising imaging technique that can benefit from the use of high atomic number (high-Z) based ... Atomic number is the number of protons an atom has in its nucleus. Mass number is the number of protons PLUS the number of neutrons in its nucleus and is ... Technetium : The Element of Atomic Number 43 · 9420 Accesses · 53 Citations · 6 Altmetric · Metrics details. Abstract. IN 1937, Perrier and Segrè showed that ... Aug 14, 2021 ... Purpose: Several new formalisms of Effective Atomic Number ( urn:x-wiley:00942405:media:mp15166:mp15166-math- ) ... Mar 5, 2025 ... Taylor, M, Franich, Rick, Trapp, Jamie, & Johnston, Peter (2008) The effective atomic number of dosimetric gels. Results for the limiting screening number as N -> oo of an electron in the (nl) radial wave function of an atom with atomic number N, are extended to ... Mar 20, 2025 ... The atomic number (Z) of an element is the number of protons in the nucleus of each atom of that element. This means that the number of protons ... We have compared effective atomic numbers of some important tissue substitutes by four methods (ie, Auto-Z eff , direct method, interpolation method, and power ...