Alkali metals (situated far away from transitional metals and noble gases) are the most reactive elemental group. Cesium is second from the bottom of this group, with 6 electron shells, so it fits all the characteristics of a reactive atom, therefore making it the most reactive element.

All noble gases have full s and p outer electron shells (except helium, which has no p sublevel), and so do not form chemical compounds easily.

The number of electrons in the outermost shell of an atom determines its reactivity. Noble gases have low reactivity because they have full electron shells. Alkali metals are highly reactive because they readily lose the single electron in their outermost shell.

Fluorine is the most reactive element among the given elements.

The elements toward the bottom left corner of the periodic table are the metals that are the most active in the sense of being the most reactive. Lithium, sodium, and potassium all react with water, for example.

To be reactive is to be ready to react or respond to something else — as opposed to ready to act on one’s own. A person who’s reactive does things only in response to others. Some chemicals are called reactive, too, because they react readily with other chemicals.

In a reactivity series, the most reactive element is placed at the top and the least reactive element at the bottom. More reactive metals have a greater tendency to lose electrons and form positive ions ….The reactivity series.

If we look at this activity series, copper does indeed react, but it’s not too great at it. You can see that the elements at the bottom are most suitable as wire and that’s not a coincidence! These elements do not oxidize (donate electrons) easily which explains why they are less reactive.

1 Answer. Copper is an unreactive metal and doesn’t react in normal circumstances with dilute acids. However, it does react with nitric acid.

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Yes, it is obvious that copper will not react with hydrochloric acid for the simple reason it’s below hydrogen in the reactivity series. So, copper cannot replace the hydrogen in HCl to form CuCl2 . Hence, when copper (Cu) reacts with hydrochloric acid (HCl) there will be no reaction.

Fisher Science Education Copper, Turnings

When copper is exposed to oxygen, it forms molecules called copper oxide that make pennies look dirty. As the penny dries and is exposed to the air, a chemical reaction occurs and the penny turns green! The green compound is called malachite.

The INSIDER Summary: Wearing copper jewelry can cause your skin to turn green due to chemical reactions. To prevent it coat your jewelry with clear nail polish and keep away from water. The reason your skin turns green is actually a normal reaction from the copper in your ring.