Which Metal is the Most Reactive Element?

By BYJU'S Exam Prep

Updated on: November 9th, 2023

Potassium is the most reactive metal. The arrangement of metals in declining order of their reactivity is called the “metal reactivity series,” sometimes known as the “activity series.” Metals frequently create cations and lose electrons. It can also be used to find out how reactive various metals are to acids and water. Potassium, Sodium, Lithium, Barium, Strontium, and other metals are listed in decreasing order of their reactivity.

Most Reactive Metal

The most reactive metal is Potassium. Chemical reactivity in the periodic table decreases from left to right and, for metals, rises as you proceed down the group. This happens because the elements are less reactive than the metals, which have higher valency as you travel from left to right in the periodic table. After all, they have more electrons in their valence shells.

High chemical reactivity results from the ease with which electrons may be taken away as you progress down the group. Alkali metals become increasingly reactive as you go down the group. As a result, compared to alkaline metals, sodium, and potassium are less reactive with water, although calcium is more reactive than magnesium. The elements at the very left have smaller radii and greater radii.

Facts on Reactive Elements

Most metals produce metal oxides when they interact with ambient oxygen. However, the reactivities of various metals toward oxygen vary. Check the important information on the most reactive elements.

  • Potassium is a reactive metal and is a mineral and an electrolyte.
  • Your muscles, including those that control your breathing and heartbeat, may move because of Potassium.
  • The electro-positivity of the elements decreases as one moves down the metal reactivity series.
  • In the activity series, all metals above hydrogen react with diluted HCl or H2SO4 to release gas.
  • These metals rust and oxidize quite fast.
  • Your kidneys remove reactive metals from your blood that your body does not need.
  • The information may be used to assess if a metal can displace another in a single displacement reaction.

Characteristics of Reactive Metals

Given their ease of oxidation, the metals near the top of the reactivity range are effectively reducing agents. These metals corrode and discolor quickly. While moving down the series, the metals’ reducing power becomes weaker. All metals found above hydrogen in the activity series react with diluted HCl or diluted H2 to release H2 gas H2 SO4.


  • The chemical element sodium has the chemical symbol “Na” and an atomic number of 11.
  • It is a delicate, silvery-white metal that is exceedingly reactive.
  • Due to its placement in group 1 of the periodic table, sodium is an alkali metal.


  • A mineral called calcium is essential to life.
  • Calcium is represented by the letter “C” and has the atomic number 20.
  • Calcium aids in bone development and maintenance, as well as blood clotting, muscular contraction, and heartbeat.
  • Our bones and teeth contain 99% of the calcium in our body.
  • Through our skin, nails, hair, perspiration, urine, and faeces, we lose calcium every day.
  • Our bodies are unable to generate calcium on their own.


  • With the atomic number 26 and the symbol “Fe,” iron is a chemical element.
  • It is a metal that is found in group 8 of the periodic table and the first transition series.


  • Both a mineral and an electrolyte, potassium.
  • It facilitates the function of all of your muscles, including those that manage your breathing and heartbeat.
  • Your diet provides you with potassium.
  • When your body needs potassium, it uses it.
  • Your kidneys filter the surplus potassium from your blood that your body does not require.
  • Its atomic weight is 19.

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