Which two groups of elements in the periodic table are the most reactive?(1 point)
Responses
alkaline earth metals and halogens
alkaline earth metals and halogens
noble gases and alkali metals
noble gases and alkali metals
alkali metals and halogens
alkali metals and halogens
halogens and noble gases
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.