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This is a square matrix where the number of rows and the number of columns are equal.
periods are the rows and families are the columns
They are called periods because after each period in the following period elements are ordered according to their properties at the intersection with vertical columns (groups) and these properties are periodically reproduced.
It is true that periodic table is divided into rows and columns. The rows are called periods and columns are called groups.
Draw either 3 rows of 5 columns or 5 rows of 3 columns.
The columns are groups or families, and the rows are periods.
table
The vertical columns in a periodic table are called Groups.
Groups
The columns are called certain groups.
False; That would be called groups. Periods are horiztonal rows.
the rows of the Periodic Table are called groups or families and the rows are called periods