The Modern Periodic Table has ________ groups and ___________ periods.

Correct option is B

Correct Answer:B. 18, 7

Explanation:

Modern Periodic Table Structure:

•     The Modern Periodic Table, based on the Periodic Law, organizes elements according to their atomic numbers.
•     It consists of 18 vertical columns called groups and 7 horizontal rows called periods.

Groups:

•    There are 18 groups in the Modern Periodic Table.
•      Groups represent elements with similar valence electron configurations and chemical properties.

Periods:

•      There are 7 periods in the table.

Each period corresponds to the filling of a particular electron shell or energy level.