Which two groups of elements in the periodic table are the most reactive?(1 point) Responses halogens and noble gases halogens and noble gases alkali metals and halogens alkali metals and halogens alkaline earth metals and halogens alkaline earth metals and halogens noble gases and alkali metals
The two groups of elements in the periodic table that are the most reactive are alkali metals and halogens.
The two groups of elements in the periodic table that are the most reactive are the alkali metals (Group 1) and the halogens (Group 17).
To determine this, you can look at the periodic table and consider the trends in reactivity.
- Alkali metals, such as lithium (Li), sodium (Na), and potassium (K), have a single electron in their outermost energy level. These elements are highly reactive as they readily lose this outer electron to achieve a stable electron configuration, forming positive ions (cations). They react vigorously with water and easily oxidize in air.
- Halogens, such as fluorine (F), chlorine (Cl), and bromine (Br), have a high electronegativity and require only one additional electron to obtain a stable electron configuration. They are highly reactive nonmetals and tend to gain this extra electron, forming negative ions (anions). Halogens readily react with alkali metals and other elements to form compounds.
Therefore, the correct answer is: alkali metals and halogens.