Answer:
C. fluorine and chlorine
Step-by-step explanation:
Fluorine and chlorine are the elements among the given choices that will show similar characteristics.
The reason for this is that elements in the same group show similar chemical behavior.
- Fluorine and chlorine are both halogens.
- They belong to the seventh group on the periodic table.
- Hence they have 7 electrons in their valence shell.
- This accounts for the similar chemical behavior and predictable physical characteristics they show.