they are called periods
Horizontal rows are called periods. There are 7 periods in periodic table.
The horizontal rows in a periodic table are called periods. Periods represent the number of energy levels an atom's electrons occupy in an element's electron cloud.
Elements to the right of the stair steps on the periodic table are known as nonmetals or metalloids. These elements have properties that are distinct from the metals found on the left side of the stair steps.
The vertical groupings of elements in the periodic table are called "groups" or "families." They share similar chemical properties due to having the same number of electrons in their outer energy level.
Groups, 1 through to 8 (or 0) The internet will tell you details about the individual groups. P.S. The rows are called periods
The vertical sections of the periodic table are called groups or columns.
period
Horizontal rows are called periods. There are 7 periods in periodic table.
The Periodic Table is arranged like it is for a specific reason. It is probably called the Periodic Table because it is made up of "periods" or horizontal rows.
The horizontal rows in a periodic table are called periods. Periods represent the number of energy levels an atom's electrons occupy in an element's electron cloud.
they are called periods, but most people will know if you call them rows
The Communist's Periodic Table of Elements:)Couldn't Resist
Periods
The Periodic Table of Elements
The horizontal rows are called periods. The vertical columns are groups.
Periods
The halogens