The rows are called periods.
And the columns are called groups.
groupsi
A horizontal row on the periodic table of elements is called a period.
A row of elements across the periodic table is called a period. Periods represent the number of electron shells in an atom.
Period
The atomic number increases by one as you go across a row on the periodic table. Each element in the row has one more proton in its nucleus than the previous element, which is reflected in the increase in atomic number. This trend continues across each row of the periodic table.
The periodic table is an arrangement of the elementsfound in nature.
The atomic number increases by 1 as one go across a row on periodic table. The elements are arranged in order of increasing atomic number.
its called a period.
An elements period is its row in the Periodic Table.
An elements period is its row in the Periodic Table.
The periodic table is arranged by increasing atomic number, which moves from left to right across each row. As you move from left to right across a row, the elements increase in atomic number and atomic mass, with similar chemical properties grouped together.
An elements period is its row in the periodic table.