To find the number of valence electrons of an element, we must only refer to the periodic table and seek the element’s position within it. The Periodic Table. The periodic table is a neat arrangement of all the elements we have discovered to this point..Atoms are made of protons, neutrons, and electrons. Protons carry a positive electrical change, while electrons are negatively charged, and neutrons are neutral. A neutral atom has the same number of protons and electrons charges cancel each other out . An ion has an unequal number of protons and electrons..Electron is an open source project maintained by GitHub and an active community of contributors. Cross Platform. Compatible with Mac, Windows, and Linux, Electron apps build and run on three platforms. The hard parts made easy. Automatic updates Native menus notifications.Basic information, atomic structure, and table of isotopes..