You are watching: What determines the reactivity of an atom
The reactivities of aspects can it is in predicted by routine trends (patterns in ~ the periodic Table.)
Let"s start with periodic trends. One element"s reactivity is its propensity to lose or acquire electrons.
The Alkali metals (Group 1) have actually the highest propensity to shed electrons, making lock the most reactive of the...
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The reactivities of facets can be predicted by routine trends (patterns in ~ the regular Table.)
Let"s start with regular trends. An element"s reactivity is its tendency to shed or get electrons.
The Alkali steels (Group 1) have actually the highest propensity to shed electrons, making castle the many reactive of the metals. This is because they have actually one outer electron and also losing it offers them the security of a outer electron shell as the next level down becomes the highest occupied level. The Alkali metals become more reactive relocating down in the group, with francium gift the most reactive. This tendency occurs since each element, as you move down, has much more inner electrons the shield the one valence electron from the nuclear charge making it much less attracted.
The Alkaline planet Metals (Group 2) are the next most reactive the the metals. They achieve stability by losing two electrons. It takes more energy to eliminate a 2nd electron, i m sorry is why they"re much less reactive 보다 the group 1 metals. The trend for steels is the they become much more reactive going down and also less reactive going throughout in the regular table.
The Halogens (Group 17 or VIIA) room the many reactive non-metals due to the fact that they have the highest tendency to obtain an electron. This is an extension of the routine trend that the energy required to remove an electron boosts going across a row of the periodic table. In ~ a allude it becomes more energetically favorable for an atom to get electrons than to lose electrons. The Halogens, having 7 valence electrons, attain a complete outer level by obtaining one electron. The facets of the Oxygen family accomplish a complete level by getting two electrons. The tendency for non-metals (Groups 14-18 or IVA - VIIIA) is the they become more reactive relocating up in ~ a group and moving to the right across a row.
The noble gases, group 18 on the far right, are the least reactive of all elements because they have actually a full outer level the electrons.
There is published data to assist you identify relative reactivity the the shift metals, i m sorry don"t follow trends as closely. The activity collection of steels is a ranking of bespeak of reactivity.
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It"s also feasible to produce one"s own activity series by reacting several facets with the very same compound, for example reacting a collection of metals with the very same acid and also ranking castle by monitoring of rates of reaction.