The columns are groups or families. The rows are periods. The groups are numbered 1 to 18, with certain other distinctions. Group 18 is known as the noble gases. There are also larger groupings in to categories such as metals, non-metals, transistion metals, metaloids, etc.
The horizontal sections of the periodic table are called periods.
The horizontal rows on the periodic table are called periods.
The rows of elements in the periodic table are called periods. There are a total of 7 periods in the periodic table, each representing a different energy level or shell in which the elements' electrons are arranged.
Dmitri Mendeleev first periodic table is called Mendeleev's periodic table. Elements are arranged according to atomic mass.
The horizontal rows are referred as periods. There are 7 periods in periodic table.
Vertical columns are referred as groups. They are also called families.
no fixed limit
the vertical columns are known as groups
colums are called "families" or "groups". They are all placed in order according to the atomic number, and valend electrons
Groups of the Periodic Table are defined as vertical colums. There are 18 groups in the periodic table.
Elements with the same number of valence electrons are in the same group (or vertical column).
It arranges all known elements in a chart of rows and colums of increasing 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.