Elements belonging to the same group have the same valency.​

Explanation:

Elements in same group show same valency because they have same number of electrons in ther outermost shell i.e. Valence shell. Since valency depends upon the valence electrons so they have same valency. Elements in the same group have same valancy.

The valency of an element is determined by the number of valence electron in the outermost shell of an atom of an element

its Affu

vertical merger is the term used for the joining of two or more firms involved in different stages of producing the same good or services.

explanation:

jupiter is mainly composed of hydrogen and helium just like a star. spectral analysis of jupiter has revealed that in addition to hydrogen and helium, the planet is made of water, methane and ammonia. those elements are in trace amounts. the core of the planet is thought to contain some rock and metallic hydrogen. i hope this will give you the answer to your question! : d