Question

elements with similar chemical properties are found
a. in the same period
b. randomly across the periodic table
c. in the same group (column)
d. on opposite sides of the table

Explanation:

Elements in the same group (column) of the periodic table have similar chemical properties. This is because they have the same number of valence electrons, which determines their chemical behavior. For example, the alkali metals (Group 1) all have one valence electron and exhibit similar reactive properties.

Answer:

C. in the same group (column)