Final answer:
The modern periodic law states that properties of elements are periodic functions of their atomic numbers. The modern periodic table is structured in rows called periods and columns called groups.
Step-by-step explanation:
The Modern Periodic Law
The modern periodic law states that the properties of elements are a periodic function of their atomic numbers. This means that elements with similar properties occur at regular intervals within the periodic table.
Structure of the Modern Periodic Table
The modern periodic table is structured in rows called periods and columns called groups. The elements are arranged in increasing order of their atomic numbers from left to right and top to bottom. Elements in the same group have similar chemical properties.
Learn more about Modern Periodic Law and Structure of the Modern Periodic Table