Probable lanthanum.
The chemical reactivity (and electronegativity) are very similar for lanthanoids. This explain the difficulties of identification and separation.
Francium is the most reactive metal in group 1 of the Periodic Table. It is extremely rare and highly unstable, reacting violently with water and air.
lanthunum-maybe
Barium and radium (alkaline earth metals)
lanthanum
Francium
the most reactive (non-metals) group in the periodic table is GROUP 17+they are all reactive
Francium is the most reactive metal in group 1 of the periodic table. It is highly unstable and radioactive, making it difficult to study its chemical properties. Francium reacts violently with water and air, similar to other group 1 metals.
Group 1, or the alkali metals, left of the table and Group 17, the halogens, right of the table are the most reactive groups. Fr, or Francium (atomic number 87) is the most reactive metal- and fluorine the most reactive halogen. Francium and fluorine would react together explosively they are so reactive.
Sodium is a metal. It is a soft, silvery-white metal that is highly reactive and found in Group 1 of the periodic table.
Potassium is the most reactive metal in the fourth period of the periodic table. It is highly reactive due to its low ionization energy, which allows it to readily lose electrons to form positive ions. This reactivity increases as you move down the group.
The Alkali metals are the most reactive group of metals in the Periodic Table. Of these Francium is the most reactive metal of all.
The least reactive metal in group 1 of the periodic table is francium. Francium is highly radioactive and has a very short half-life, making it extremely rare and difficult to study its chemical properties.
The Alkali metals are the most reactive group of metals in the Periodic Table. Of these Francium is the most reactive metal of all.
This element is francium in the first group of periodic table.
Lithium
Group 1 or alkali metals
Francium is the most reactive metal in group 1 of the periodic table. It is highly unstable and radioactive, making it difficult to study its chemical properties. Francium reacts violently with water and air, similar to other group 1 metals.
Alkaline metals (Group 1) are the most reactive metals.
caesium is the most reactive non-radioactive metal and Florine is the most reactive non-metal, but francium is the most reactive, radioactive metal
The most reactive group of non metal is group-17. It is called halogen family.
The alkali metals in group 1 are the most reactive.
in the Periodic Table it is the most reactive metals!