yes
Iron is reactive but not highly reactive, while oxygen is highly reactive. When iron reacts with oxygen, it forms rust. Oxygen is highly reactive because it readily forms bonds with other elements, making it important for various chemical reactions.
Yes. Lithium is very reactive to other elements.
Most types of Iron are magnetic, however depending on its composition and purity, there are kinds that are not magnetic. For example, Steel is mostly Iron, Carbon, and a few other lesser materials, and can be magnetic. Pure Iron is of course magnetic. The iron in your blood, however, is not the magnetic variety. It all depends on the composition.
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It is not reactive at all. It will not combine with other elements.
The discovery of the order of elements calcium, gold, and iron is attributed to their differing reactivities. Calcium is more reactive than gold and iron is less reactive than both. This reactivity trend helps explain why these elements were discovered in that particular order historically.
One chemical property of oxygen is its ability to react with other elements to form oxides. Oxygen is a highly reactive element that readily combines with many other elements, such as iron (Fe) to form iron oxide (Fe2O3) or hydrogen (H) to form water (H2O).
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Potassium is the most reactive element among potassium, iron, and aluminum. It is a highly reactive alkali metal that readily reacts with water and air. Iron is moderately reactive, while aluminum is reactive but forms a protective oxide layer that prevents further reaction with the environment.
Boron is typically considered to be reactive, although it is less reactive compared to elements like sodium or chlorine. Boron can form compounds with other elements through bonding, such as in borax or boric acid.
iron cobalt and nickel are magnetic the others are not.
The reactivity of an element increases towards the top and right of the periodic table (until the column of noble gases is reached). Chlorine's outer shell contains 7 electrons that make it very reactive. Helium is a noble gas and is non reactive. Elements found in the middle of the table, like nickel and iron, are reactive, but less reactive than chlorine