The first two groups--alkali metals and the alkali earth metals--are the most reactive.
1 & 7
As you move left on the periodic table, the elements get more reactive and as you move down the periodic table. Using that thinking the most reactive elements are the Alkali Earth Metals (column 1) and the most reactive element is Francium. The least reactive are the noble gases in the last column- Helium, Neon, Argon etc..
The most reactive metals are the alkali metals in group 1a.
In group 1 the first column on the left
The halogens, periodic table column 17, are the most reactive nonmetals, because they have the highest electronegativities and therefore can strongly attract electrons from almost any other elements.
Group 1 (metals) and Group 17 (non-metals).
Most reactive metals
As you move left on the periodic table, the elements get more reactive and as you move down the periodic table. Using that thinking the most reactive elements are the Alkali Earth Metals (column 1) and the most reactive element is Francium. The least reactive are the noble gases in the last column- Helium, Neon, Argon etc..
The most reactive metals are the alkali metals in group 1a.
alkali metals
In group 1 the first column on the left
The halogens, periodic table column 17, are the most reactive nonmetals, because they have the highest electronegativities and therefore can strongly attract electrons from almost any other elements.
Group 1 (metals) and Group 17 (non-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.
The most reactive goup in the metals is the Alkali metals (Group I) The most reactive non-metal group is Group 17 or VIIA) the Halogens. It is difficult to say which of the two groups is more reactive. Chemists will say that Flourine is the most reactive element. Note that Group 18 is the least reactive, most stable.
Noble gases (group 18) are the almost nonreactive elements. Group 1 elements are the most reactive metals. Group 17 elements are the most reactive non-metals.
These metals are called alkaline earth metals.
Francium is the most reactive metal and fluorine the most reactive nonmetal.