An alternative method for the arrangement of elements is by the use of atomic masses of the elements.
The periodic table is an arrangement of elements based on increasing atomic number. This is what is called the modern periodic law. Before the advent of the current periodic table, there have been many other kinds of periodic table.
In the periodic table as it is now, there are about 118 elements that are arranged in groups and periods. The groups contain elements that are chemically similar and could react in the same way while the periods contain elements that have the same number of shells.
However, we know that an alternative method for the arrangement of elements is by the use of atomic masses of the elements. This was the method that was used arrange the old periodic table. However, this method did not account for periodic trends.
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