Out of 115 named elements on Earth, 92 classify as natural elements. These elements exclude substances deriving from chemical bases, which do not break down into simpler molecules. The family of natural elements starts w... More »

As of 2014, there are 118 elements on the periodic chart.91 of these are generally in the list of naturally occurring elements, with atomic numbers 1 to 92. Technetium, element number 43, is radioactive with a very short... More »

As of 2014, "Doodle God", which is available on numerous platforms, has over 300 possible combinations. The original iPhone version of the game contained 115 elements. More »

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Many of the elements in the periodic table are of Latin or Greek origin, but four are named after heavenly bodies: uranium, neptunium, tellurium (named for "tellus," the Latin word for Earth) and plutonium. Some elements... More »

Periodic law, also known as Mendeleev's law, is the concept that the chemical and physical properties of elements are based on an element's atomic weight when arranged by increasing periodic atomic number. Periodic law w... More »

Mendeleev left gaps in his periodic table because the properties of known elements predicted other, as-yet-undiscovered, elements in these locations. As Mendeleev organized his periodic table, he recognized that these ga... More »

There are multiple elements that have six valence electrons, including oxygen and sulfur. These elements can be found in the sixteenth group in the vertical column of the periodic table, also known as the chalcogens. More »