Question

topic is periodic table you could choose any subtopic within that like development of periodic table modern periodic table​

Answer 1

$\huge \sf {\orange{\underline{\purple{\underline{Question:-}}}}}$

Similarities between Mendeleev's periodic and Modern periodic table: Elements are arranged in groups and periods. Elements with similar properties are placed in the same group. Metals and non-metals are placed separately.

In December 2015, the International Union of Pure and Applied Chemistry (IUPAC) verified the existence of four new elements 113, 115, 117, and 118 and approved their addition to the periodic table. These elements complete period 7 of the periodic table..