12. name some properties of the halogens group.
12. name some properties of the halogens group.
Answer
Brief Explanations:
Halogens are non - metals in Group 17 of the periodic table. They are highly reactive, have 7 valence electrons, and exist as diatomic molecules in their elemental form at room temperature (e.g., $F_2$, $Cl_2$, $Br_2$, $I_2$). Their reactivity decreases down the group. Fluorine is the most reactive halogen.
Answer:
High reactivity, 7 valence electrons, exist as diatomic molecules (at room - temperature for some), reactivity decreases down the group.