they are numbered by their Atomic numbers
The horizontal rows are periods on periodic table. There are 7 horizontal rows in modern periodic table.
rows. the vertical columns are called periods
They are the horizontal rows in the periodic table
The horizontal rows of the periodic table are called Periods and the vertical rows are called groups.
The horizontal rows are referred as periods. There are 7 periods in periodic table.
The two names for horizontal rows on the periodic table are periods and series.
Yes. the horizontal rows on the periodic table are called periods.
period
The horizontal rows in the periodic table are known as periods. There are seven periods in the periodic table, each representing a different energy level or shell in which the elements' electrons are located.
Horizontal rows on the Periodic Table of Chemical Elements are called periods.
The horizontal rows on the Periodic Table are called periods.
The horizontal rows are called periods