Question

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2. The elements belonging to group 1,2 and group 13 to 18 are known as…..

(Transition metals, Representative elements, Noble gases, Lanthanides)​

Answer 1

Answer :

The elements belonging to group 1,2 and group 13 to 18 are known as representative elements.

★ Additional Information :

• Transition elements are the elements which lie in between s and p block elements in the long form of periodic table.
• Lanthanoids : The elements with atomic number 58 to 71 (which come immediately after lanthanum) are called lanthanoids.
• Group 18 elements are called noble gases.

➠ The horizontal rows in the periodic table are called periods and vertical columns are called groups.

➠ The long or extended form of periodic table consists seven periods and eighteen groups$.$

➠ The modern periodic law states that the physical and chemical properties of the elements are periodic functions of their atomic numbers.

Answer 2

Answer :

The elements belonging to group 1,2 and group 13 to 18 are known as representative elements.

★ Additional Information :

Transition elements are the elements which lie in between s and p block elements in the long form of periodic table.

Lanthanoids : The elements with atomic number 58 to 71 (which come immediately after lanthanum) are called lanthanoids.

Group 18 elements are called noble gases.

➠ The horizontal rows in the periodic table are called periods and vertical columns are called groups.

➠ The long or extended form of periodic table consists seven periods and eighteen groups$.$

➠ The modern periodic law states that the physical and chemical properties of the elements are periodic functions of their atomic numbers.