Question

structure of on modern periodic table

Answer 1

HEY FRND...☺☺☜
⛤☛THERE ARE⛤☛☺ first big grouping within the modern Periodic Table is whether an element is a metal, non-metal, or metalloid (semi-metal).
⛤☛☺where Groups are the COLUMNS (vertical, up-down)Periods are the ROWS (horizontal, side-to-side)
⛤☛☺The periodic table has 18 main group and 7 groups...

Answer 2

Explanation:

The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties. ... The seven rows of the table, called periods, generally have metals on the left and nonmetals on the right.