Question

Who made the modern periodic table?

Answer 1

Modern periodic table

• Modern Periodic Table arranges the elements in the order of their atomic numbers in seven horizontal rows and eighteen vertical columns.
• The modern periodic table was invented by Henry Moseley, the English physicist.

Groups and periods

• The periodic table involves $18$ vertical columns and $7$horizontal rows.
• The horizontal rows are referred to as periods.
• The vertical columns are referred to as groups.