This is a an excellent question and a full answer would take a job in chemistry, yet I"ll shot to offer you a shorter answer. Have you learned the structure of an atom yet?

an atom is composed of neutrons, protons, and electrons. For a good introduction see: atom.

The neutrons and also protons room in the facility of the atom and also the electron "orbit" roughly the outside. Electrons execute not orbit precisely the method the moon orbits the earth, yet if you think of the that way to begin with, the works.

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All chemical reactions occur between the electrons of various atoms. as soon as an atom has certain numbers of electrons about it, it is more stable - 2, 10, 18, etc .

If girlfriend look in ~ a routine table, you check out that this numbers correspond to the appropriate hand side -- the noble gases -- these space very no reactive. They have actually a stable number of electrons and also do not should react with other atoms. All various other atoms have less stable electron numbers, therefore they react with each other and also share electrons to be more stable. The many reactive elements tend come be quick one or two electron or have actually one or two extra. because that instance, fluorine (9) and also chlorine (17) are short one electron from being the most stable and they are really reactive! salt (11) and Potassium (19) have extra electrons and are really reactive. All the rest of the facets in between are much less than perfect stable, for this reason they react with each other to various degrees.

Understanding every the reasons behind the miscellaneous intermediate reactivities is whereby the job in chemistry comes in. You are on your way.

Answer 2:

The factor that different elements have various levels the reactivity has to do v the structure of the atoms themselves.

An atom is made of protons, neutrons and also electrons. The neutrons and protons space bundled increase in the nucleus or center of the atom. The electrons on the other hand fly roughly the cell nucleus in a huge cloud. the might aid to think the electrons together social little creatures. They don"t choose to be alone.

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Highly reactive elements like the people on the left next of the periodic table have a lonely electron flying around by itself so it desires to do friends and also react with the electron from other atoms. Non-reactive elements like those top top the ideal of the periodic table have nice happy family members of electrons that don"t should make any brand-new friends. whatever in the center is somewhere in between. Also, as you go down the routine chart, the facets get bigger therefore the external electrons get further away from the nucleus. This means that they space even much more "friendly" and they really want to react. So in general, the farther down and also left friend go, the more reactive the facet will be. Of course there space exceptions to this rule, too!