The periodic table, also called the periodic table of ... or he assembled several 'natural groups' of elements, like the halogens and the alkali metals, and noticed a pattern of increasing weight." ...

Mendeleev discovered the periodic table (or Periodic System ... but Mendeleev saw that iodine was very similar to the rest of the halogens (fluorine, chlorine, bromine), and tellurium similar to the ...

When the alkali metals react with the different halogens (Group 7 of the periodic table), the group of compounds formed are known as the alkali metals halides. Due to the fact that there are a ...

How is the table organized? The Periodic Table, first compiled by Russian chemist Dmitri Mendeleyev, is organized by the number of protons in the nucleus of each element's atom, known as the ...