Group 1 and 17. The most reactive elements are fluorine and francium.
the most reactive (non-metals) group in the periodic table is GROUP 17+they are all reactive
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 left side
The most reactive metals will be found in Group 1 on the right side of the periodic table.
At the left, especially the lower left, and at the right, especially the upper right, of a hypothetical periodic table that is the same as the standard periodic table except for omitting the noble gases.
the alkaline metals they are on the far left side of the table
the alkaline metals they are on the far left side of the table
Alkali metals, on the far left side, with 1 valence electron.Halogens, next to the far right side, with 7 valence electrons.These are particularly reactive because they only need to lose or gain one electron to balance their valence band.
The reactivity is increasing, from left to right - for example halogens.
the elements on the left side are most reactive. reactivity decreases as you move to the right. the noble gases (last group) are least reactive.
The Group 1 alkali metals are the most reactive from the periodic table. They are the most reactive, because they have only 1 valance (outer shell) electron. Reactivity increases as you go down in the group because as there are more shells as you move down, the proton/nucleus cluster in the centre exert a lesser force of gravity on the more distant valance electron, which causes it to be lost even more easily.