header row
header row
The elements that are placed outside of the periodic table are called transactinides. These elements are usually placed in a separate row below the main table and are synthetic elements that do not occur naturally on Earth.
A horizontal row on the periodic table of elements is called a period.
Helium is in Group 18 (also known as the noble gases) and in the top row of the periodic table.
This is where the name of the table comes from. A horizontal row of elements is called a period. A vertical column is a group.
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a horizontal row is called a period.a vertical row is called a group
A row in the periodic table is called a period. Columns are groups.
A row in the Periodic Table is called a period. Columns are groups.
A row in the Periodic Table is called a period. Columns are groups.
In the top row or the first row.
The elements that are placed outside of the periodic table are called transactinides. These elements are usually placed in a separate row below the main table and are synthetic elements that do not occur naturally on Earth.
a horizontal row is called a period.a vertical row is called a group
The horizontal row on the periodic table is called the "period". The vertical column is called the "group".
groupsi
A horizontal row on the periodic table of elements is called a period.
period