Question

define Modern Periodic law and its
features.​

Answer 1

Answer:

The long form of periodic table consist of vertical columns called groups and horizontal rows called periods. Elements are arranged in the increasing order of atomic numbers. Elements in the modern periodic table are arranged in 7 periods and 18 groups

2)he modern periodic law states that the properties of the elements are a periodic function of their atomic numbers. ... The vertical columns of the periodic table are called the groups and the elements of the same group share similar properties. The horizontal rows are called the periods.

Explanation:

Answer 2

Answer:

According to the modern periodic law, the physical and chemical properties of elements are a periodic function of their atomic number.

This means that when elements are arranged in the order of their increasing atomic number elements of similar properties will recur at regular intervals or periodically.

Hope it helps !!....