All elements have same number of valence electrons (two) and hence they have similar reactivity and chemical properties.
They are not, the most common elements are Hydrogen and Helium.
Carbon, Hydrogen, Nitrogen, and Oxygen are the four most common elements.
All elements in the oxygen family have 6 electrons in the outer orbit.
Water is not an element. It is a compound of Hydrogen and Oxygen.
Sulfur belongs to the oxygen family, also known as group 16 or the chalcogens. Other members of this family include oxygen, selenium, tellurium, and polonium. These elements share similar chemical properties due to their common electron configurations.
Elements in the same family (or group) have the number of valence electrons in common. Ex: Family 16 - 6 valence electrons.properties
These elements are carbon, oxygen, hydrogen.
Oxygen and Carbon
the chalcogen family
Hydrogen and Oxygen
The most common elements in the universe are, Carbon, Oxygen, Nitrogen, Iron and Hydrogen,
According to http://www.scienceclarified.com/Oi-Ph/Oxygen-Family.htlm:The oxygen family consists of the elements that make up group 16 on the periodic table: oxygen, sulfur, selenium, tellurium, and polonium. These elements all have six electrons in their outermost energy level, accounting for some common chemical properties among them. In another respect, the elements are quite different from each other. Oxygen is a gaseous nonmetal; sulfur and selenium are solid nonmetals; tellurium is a solid metalloid; and polonium is a solid metal.