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 ...

The periodic table The periodic table is a chart of all ... all react vigorously with water to produce an alkaline solution. Group 7 halogens The Group 7 elements are also known as the halogens.