Define atomic number.

Are all atoms of an element the same? How can you tell one isotope from another? Use the sim to learn about isotopes and how abundance relates to the ... The contrast between the tissues in the image is generated by the difference between the x-ray attenuation (influenced by density and atomic number). The control of plasma density profiles is one of the most fundamental problems in fusion reactors. During reactor operation, the density profiles of ... Apr 9, 2010 ... A collaboration of Russian and US physicists has created the superheavy element 117, an experimental achievement that fills in the final gap on the list of ... Jun 23, 2023 ... The total number of protons and neutrons in an atom is called its mass number (A). The number of neutrons is the difference between the mass ... One atomic mass unit (amu): the mass exactly equal to one-twelfth the mass of one carbon-12 atom that has six protons and six neutrons. 1 atom of carbon-12 = 12 ... The number of electrons and protons in an atom determines its chemical properties. Chemical properties include the specific ways that atoms and molecules react ... 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 ... Jun 29, 2014 ... 1 Answer ... The symbol for atomic number, Z, stands for "Zahl", which means number in German. Prior to 1915, the symbol Z denoted the position of ... There is no word that rhymes with the English word silver. It is a transition metal element, with symbol Ag, atomic number 47, and atomic weight of 107.8682.