Elements in the same group (vertical column) of the periodic table share similar chemical properties because they have the same number of valence electrons. Valence electrons are the electrons in the outermost shell of an atom, and they are responsible for the atom's chemical reactivity.

The elements in group 16 all have six valence electrons. This means that they can all form covalent bonds with other atoms by sharing their valence electrons. They can also form ionic bonds by losing or gaining electrons.

The similarity in the number of valence electrons among the elements in group 16 gives them similar chemical properties, such as:

* They are all non-metallic.

* They all have low electronegativities.

* They all form covalent bonds with other atoms.

* They can all form ionic bonds by losing or gaining electrons.

* They all react with oxygen to form oxides.

* They all react with hydrogen to form hydrides.

The elements in group 16 are:

* Oxygen (O)

* Sulfur (S)

* Selenium (Se)

* Tellurium (Te)

* Polonium (Po)

These elements are all used in a variety of applications, such as:

* Oxygen is used in the production of steel, plastics, and fertilizers.

* Sulfur is used in the production of sulfuric acid, which is used in a variety of industries, such as the fertilizer industry and the petroleum industry.

* Selenium is used in the production of semiconductors and solar cells.

* Tellurium is used in the production of semiconductors and alloys.

* Polonium is used as a source of alpha particles in nuclear power plants and in medical applications.