Usually credited to Dmitri Mendeleev.
By Atomic Mass
Now modern periodic table is arranged in order of increasing atomic number. The properties are found to be periodic when arranged in this pattern.
In the periodic table, the elements are arranged by atomic number
how would the modern Periodic Table be different if elements were arranged by average Atomic Mass instead of by atomic number
Mendeleev arranged the elements in his periodic table in order of increasing atomic mass while also grouping elements with similar properties together. His periodic table laid the foundation for the modern periodic table we use today.
The modern version of the periodic table is arranged according to the atomic number.
Elements are arranged by their atomic number. The properties are periodic when arranged in this manner.
The Periodic Table was arranged by atomic number.
It is arranged on the acending order of atomic number and repeating periodic properties.
Elements are arranged in the order of their atomic number on the periodic table.
Periodic table is arranged by atomic number. elements are arranged in groups and periods.
The periodic table is arranged in order of atomic number, not atomic weight. This is because the properties of elements are determined by the number of protons in the nucleus, which is the atomic number. Atomic weight is not used because it can vary due to isotopes of an element.