Given the unidentified isotope 137 67x, which number stands for protons, electrons, and neutrons?

From this unidentified isotope, the value of 137 would represent the sum of protons and neutrons present. While the value below it, if written in nuclear notation represents the number of protons, in this case 67. To determine the number of neutrons, you simply need to subtract the mass number by the atomic number, the number of protons.

Assuming that this is an example of a neutral isotope that is unidentified the number of electrons would be equal to the number of protons present. So there would be 67 electrons.

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

Order of filling levels and sublevels of electrons: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²3f¹⁴5d¹⁰6p⁶for an element with 5 electrons in the 3d energy level: full configuration: 1s²2s²2p⁶3s²3p³.