Groups or families; all are arranged by the number of valence electrons.
each row in the Periodic Table is called a period.
Rows in the Periodic Table are called Periods.There are 7 periods in total.All the elements in period have same number of energy levels.
Horizontal rows are called periods. There are 7 periods in periodic table.
The horizontal rows are periods on periodic table. There are 7 horizontal rows in modern periodic table.
It is named The PERIODIC TABLE. The periods being the horizontal rows The groups being the vertical columns.
each row in the Periodic Table is called a period.
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.
Rows in the Periodic Table are called Periods.There are 7 periods in total.All the elements in period have same number of energy levels.
Horizontal rows are called periods. There are 7 periods in periodic table.
The horizontal rows are periods on periodic table. There are 7 horizontal rows in modern periodic table.
Horizontal rows are called periods. There are 7 periods in 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.
A row of elements across the periodic table is called a period. Periods represent the number of electron shells in an atom.
Horizontal rows on the Periodic Table of Chemical Elements are called periods.
It is named The PERIODIC TABLE. The periods being the horizontal rows The groups being the vertical columns.
The horizontal rows on the periodic table are called periods.
The rows on the periodic table are called periods.