Question

level 1
what are the vertical columns of the periodic table called?
a. clusters
b. teams
c. periods
d. groups

Explanation:

In the periodic table, vertical columns are known as groups. Elements in the same group have similar chemical properties due to having the same number of valence - electrons. Clusters and teams are not terms used for periodic - table columns. Periods are the horizontal rows.

Answer:

D. Groups