Respuesta :
Answer:
c.All are halogens, so they are not very chemically active,
Answer:
d
Explanation:
they are in the same group/family so that means they have the number of valence electrons
Answer:
c.All are halogens, so they are not very chemically active,
Answer:
d
Explanation:
they are in the same group/family so that means they have the number of valence electrons