Question

ions of the elements oxygen (o), sulfur (s), and selenium (se) usually have charges of 2-. ions of the elements fluorine (f), chlorine (cl), and bromine (br) usually have charges of 1-. this demonstrates that

a. elements in the same group share certain properties, and each group has unique properties

b. elements in the same group do not share any properties

c. each group of elements has the same properties, but each element within a group has unique properties

d. elements in different groups all have the same properties

Explanation:

Oxygen, sulfur, and selenium are in the same group (Group 16) and have similar ion - charges. Fluorine, chlorine, and bromine are in the same group (Group 17) and have similar ion - charges. This shows that elements in the same group share certain properties, and each group has unique properties.

Answer:

A. elements in the same group share certain properties, and each group has unique properties