groups of families but groups is more commonly used
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The rows (Horizontal) are called Periods and the Columms (Vertical) are called Groups.
The horizontal rows on the periodic table are called periods. There are 7 periods in total, each representing a different energy level or shell of electrons in an atom. Moving from left to right across a period, the number of protons and electrons increases, resulting in an increase in atomic number.
It is called the Periodic Table of Elements.
It is named The PERIODIC TABLE. The periods being the horizontal rows The groups being the vertical columns.
Periodic table comprises of rows and columns like in an organised manner. Hence, it is called a table.
The rows in the periodic table are called periods. There are 7 periods in periodic table.
The 7 horizontal rows in the periodic table are called periods.
groups
A row in the periodic table is called a period. Columns are groups.
The vertical columns of the periodic table are called groups or families.
The first block on the periodic table is called the S block.