The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

More than 75 years after its initial discovery, scientists have created an organometallic molecule containing the ...

There are currently 118 known elements listed on the periodic table; from hydrogen ... of human knowledge and understanding, ...

In this periodic table of elements quiz, you have 10 minutes to name as many elements as you can, given only their symbol, ...

For the last fifty or so years, the periodic table has been incomplete. Elements after uranium on the periodic table have been synthesized for the past few decades, but there were always a few ...

Mendeleev countered this somewhat in his book The Principles of Chemistry in 1891: "I consider it well to observe that no ... Elements' in his place. Mendeleev’s lecture described in very technical ...

No portion of this web site ... This puzzle shows many of the elements used to make transistors. The finished puzzle is a section of the periodic table, so the numbers on each tile are their ...

Image caption, The element germanium was discovered in 1886. Its properties were similar to the predicted ones of Mendeleev’s ‘eka-silicon’. The modern periodic table has no gaps and has ...

There is no experimental data for francium ... Electronegativity and ionization energy follow the same periodic table trend. Elements that have low ionization energies tend to have low ...

Image caption, The element germanium was discovered in 1886. Its properties were similar to the predicted ones of Mendeleev’s ‘eka-silicon’. The modern periodic table has no gaps and has ...