The horizontal rows are periods on Periodic Table. There are 7 horizontal rows in modern periodic table.
A horizontal row on the periodic table of elements is called a period.
rows
each row in the Periodic Table is called a period.
periodsThere are seven periods, or rows, on the periodic table.
It is named The PERIODIC TABLE. The periods being the horizontal rows The groups being the vertical columns.
A horizontal row on the periodic table of elements is called a period.
Horizontal rows in Periodic Table are called Periods
Horizontal rows are called periods. There are 7 periods in periodic table.
rows
Horizontal rows on the Periodic Table of Chemical Elements are called periods.
each row in the Periodic Table is called a period.
periodsThere are seven periods, or rows, on the periodic table.
Horizontal rows of elements in the periodic table are called periods. Each period represents a different energy level, with elements in the same period having the same number of electron shells. Periods are arranged in numerical order from left to right on the periodic table.
The horizontal rows of the periodic table are called Periods and the vertical rows are called groups.
The rows on the periodic table are called periods.
Horizontal row in a periodic table is called Period.There are seven periods in a periodic table.All elements in a row have same number of electronic shells.
The Horizontal Rows are named PERIODS The Vertical Columns are named GROUPS. The two most left - hand columns , Groups 1 & 2 are also known as the 'Alkali Metals' and 'Alkaline Earth Metals', respectively. The two most right - hand columns , are Groups 17 & 18 and are known as the 'Halogens' and 'Noble/Inert Gases', respectively. Groups 4 to 11 are often referred to as the Transition elements and produce coloured ions. In Periods 6 & 7 are the Lanthanide and Actinide elements respectively. They are often shown as a separate block at the bottom of the modern Periodic Table. They lie between Groups 2 & 4. The Actinides are so-called because they contain all the Radio-ACTIVE elements. Have a look at the 'Chemical Galaxy' on the 'web'. It shows all the elements in the form of a Catherine wheel. The spokes being the Groups and the circles being the Periods. It is quite spectacular and probably a truer representation of the elemental arrangements.