A good way to remember the order of a reactivity series of metals is to use the first letter of each one to make up a silly sentence. Observations of the way that these elements react with water, acids and steam enable us to put them into this series. The tables show how the elements react with water and dilute acids:. Note that aluminium can be difficult to place in the correct position in the reactivity series during these experiments.
This is because its protective aluminium oxide layer makes it appear to be less reactive than it really is. When this layer is removed, the observations are more reliable.
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Anne Marie Helmenstine, Ph. Chemistry Expert. Helmenstine holds a Ph. She has taught science courses at the high school, college, and graduate levels. Facebook Facebook Twitter Twitter. Updated August 17, Featured Video. Cite this Article Format.
Helmenstine, Anne Marie, Ph. What Does Reactivity Mean in Chemistry? Liquid Elements on the Periodic Table.
Element Families of the Periodic Table. How to Use a Periodic Table of Elements. Your Privacy Rights. To change or withdraw your consent choices for ThoughtCo. Permitted use: Download. They are like nobility in the sense that they don't mix with the riffraff. They don't like to react with any other elements.
Oh, ho, ho, ho! The noble gases, like neon and argon, pose a problem for chemists who prefer their elements to join forces and react with each other. You can run an electric current through them, excite their electrons and get pretty colors—which is how neon lights work—but the noble gases don't react. THEO GRAY: Being an inert gas, being unwilling to mix with the other elements, react with them, this is a very clear-cut distinction that sets apart this particular column from all the others in the periodic table.
As it turns out, protons may determine the identity of an element, but electrons rule its reactivity. And reactivity is a shell game. Imagine that these balls are electrons, and the target is an atom. Electrons don't just pile on around the nucleus. As with skee-ball, where you land, relative to the center counts.
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