electron


Element Valences 1-45
This element Valency PDF is a downloadable version of the Valences of the Elements table.  Download PDF As in the table, the most common valences are in BOLD text where values in italics are theoretical values based on periodic table trends. This table requires three sheets of paper to print. […]

Element Valency PDF


Periodic Table Electron Configuration with Orbital Blocks 2
This periodic table contains each element’s atomic number, symbol, name, atomic weight and electron configuration. It is a periodic table showing shells of the outermost electron orbital. Each lightly colored cell highlights the block of the outermost electron. Block s elements are green, p is blue, d is pink and f block elements […]

Periodic Table Showing Shells


Helium Atom
Atomic mass is the mass of a single atom. This is found by adding up all the protons, neutrons and electrons in the atom. One proton has a mass of 1,836 electrons. Since electrons barely change the outcome of the atomic mass, they are generally left out of the calculation. […]

How To Calculate Atomic Mass Tutorial



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This is a table of the valences or oxidation states of the elements. The most common valences are in BOLD. Values in italics are predicted theoretical values. This information is available on a Color Periodic Table of the Elements or a Black and White version. A simpler version listing only the […]

Table of Valences of the Elements