Question

Why and How Elements are arranged in 4th period​

Answer 1

It's a need to classify elements for understand there nature.

Elements are classified according to there physical and chemical properties of elements are periodic function of there atomic numbers.

Answer 2

Answer:

• The elements in the fourth period of the periodic table are arranged according to their atomic numbers. The first element in the period is Scandium (Sc) and the last element is a noble gas Krypton (Kr).
• In the fourth period, the number of shells of the elements present remains constant throughout the elements.
• They are placed in the fourth group for better understanding of their chemical as well as physical properties.
• The fourth group of the Periodic Table also consists of transition elements like Golf (Au), Silver (Ag), etc.