Explain the concept of atomic number and its si... - SS2 Chemistry Atomic Structure and Periodicity Question

Atomic number refers to the number of protons in the nucleus of an atom. It is a fundamental property of an element that determines its position in the periodic table. Each element has a unique atomic number.

The periodic table is organised based on the increasing atomic number of elements. Elements with similar chemical properties and behaviours are grouped in columns called groups or families. The atomic number provides a systematic way of arranging elements in the periodic table, allowing scientists to understand trends in properties as they move across periods and down groups.