The modern periodic table is based on the electronic configuration of the elements. The properties of an element are determined largely by the electrons in its outermost or valence shell.

The modern periodic table is based on the electronic configuration o

1.	The modern periodic table is based on the electronic configuration of the elements. The properties of an element are determined largely by the electrons in its outermost or valence shell.
Answer» otally right, modern PERIODIC table is based on ATOMIC number" The properties of ELEMENTS are periodic FUNCTION to their atomic number "