Answer :
The periodic table is a tabulated organization and representation of chemical elements that classify elements similar to repeating characteristics and order them by their increasing atomic number.
The periodic table is structured into:
- rows known as periods and;
- columns usually called groups.
The groups are categorized from group 1 (known as the alkali metals) to group 18 (i.e. the noble gases)
The list of the two most reactive groups are:
- Alkali metals and;
- The halogen family
- Alkali metals i.e the group 1 metals are one of the two metals with the highest reactivity. This is owing to their greater atomic radii and lower ionization energies, among other factors. They exhibit an oxidation state of +1 and typically donate electrons in reaction with the halogen family thereby resulting in the formation of an ionic bond. They also have lower boiling and melting points than other elements and are less dense.
- The halogen family which is the other group of the most reactive elements on the periodic table is distinguished by their electronegativity characteristics. i.e. their ability to attracts electrons to themselves. They are located in group 7 on the periodic table.
Thus, we can conclude that the two most reactive groups of elements in the periodic table are the alkali metals and the halogen family.
Learn more about the periodic table here:
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