Which 2 groups of elements in the periodic table are the most reactive
1. alkali metals and halogens.
2. They have the same number of valence electrons.
3. They usually have high melting points.
4. Low or no reactivity.
5. 17.
@im a npc is 100% correct for connexus!!
I and VII (or is that XVII?)
alkalis and halogens
My table uses 17 instead of XVII. It would make sense for IUPAC to set a single sytem instead of the three in use.
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 understand why these groups are the most reactive, we need to look at their electronic configurations and their tendency to gain or lose electrons.
Alkali metals have only one electron in their outermost energy level, which makes it relatively easy for them to lose that electron and achieve a stable electron configuration. This is why alkali metals are highly reactive and readily form positive ions (cations) by losing one electron.
Halogens, on the other hand, have seven electrons in their outermost energy level. They are just one electron short of achieving a stable electron configuration. Halogens are highly reactive because they have a strong tendency to gain one electron to achieve a stable configuration. This makes them highly reactive in their reactions with alkali metals.
It's important to note that reactivity can also depend on other factors such as atomic size, electronegativity, and ionization energy. However, in terms of general reactivity, alkali metals and halogens stand out in the periodic table.