What are the two words for the 18 columns of the periodic table?
The periodic table has a definite arrangement of element's atomic numbers in their increasing order. It is divided into columns and periods. The elements of a particular column exhibit similar properties.
Answer and Explanation:
The periodic table has 18 columns and 7 rows. The rows are also known as periods.
The elements present in a column of periodic table exhibit similar properties. The two names of these columns of periodic table are group and family.
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Learn more about this topic:
from Chemistry 101: General ChemistryChapter 3 / Lesson 1