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 ...

Mrs Roberts: Well, elements that have similar properties to each other are put into vertical columns called groups. Now, the table is called the periodic table because the elements with similar ...

which states that the properties of the chemical elements exhibit a periodic dependence on their atomic numbers. The table is divided into four roughly rectangular areas called blocks. The rows of the ...

The records show that Mendeleev discovered the periodic system on 17 February 1869. In fact, he was ill at the time so his colleague Nikolai Menschutkin made the announcement on his behalf – on 6 ...

The periodic table is a well-organized chart that contains all the known elements in the universe. These elements are ...

If you often find yourself at a loss for words in the heat of an argument, perhaps this Periodic Table of Swearing is something you might be interested in. Built as a marketing tool for the ...

Mendeleev discovered the periodic table (or Periodic System, as he called it ... Initially, the table had similar elements in horizontal rows, but he soon changed them to fit in vertical columns, as ...

There are repeating patterns in the properties of the elements, which give the periodic table its name. Elements with similar properties are arranged to form columns (groups). The periodic table ...

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 ...