The historically popular chart to which you refer is partially organized by the amount of carbons present in the mole. ;P
An element's atomic number, or how many protons it has.
The physical properties are not listed in periodic table. The properties like density is not listed.These can't be found on periodic table.
Periodic table help to estimate the chemical and physical properties of elements.
The periodic table of elements is the table that arranges different elements based on their common properties in rows and columns. It helps to organize and classify elements by their atomic number, electron configuration, and chemical properties.
they organised it by grouping things with similar properties together
A period on the periodic table is a horizontal row of elements that share similar properties. It helps organize the elements by arranging them in order of increasing atomic number and grouping elements with similar chemical properties together.
Mendeleev attempted to organize the chemical elements based on their atomic mass and properties, creating the periodic table. He arranged the elements in rows and columns with similar properties to create patterns and predict the properties of unknown elements.
Shortly, the chemical and physical properties of chemical elements recur periodically in the periodic table arrangement.
By physical and chemical properties
Atomic number was not used by Mendeleev to organize his periodic table. He organized the elements based on their atomic mass and properties, leaving gaps for undiscovered elements that were later filled.
Studying physical and chemical properties of chemical elements it is possible to recognize some trends in the periodic table.
By grouping the elements on the Periodic Table.