History of the Periodic Table Earlier scientists assumed that the properties of elements are periodic functions of their atomic masses. ...

What is Modern Periodic Law?  The modern periodic table is developed after the periodic law and a periodic table given by ...

The modern periodic table is based on the law that the properties of an element are a periodic function of ...

What is Atomic Size?  Atomic size is the distance between the centre of the nucleus of an atom and its ...

Periodic categorization of elements is a way of grouping elements based on their characteristics, such as keeping elements that are ...

Periodic Classification of Elements refers to the arrangement of elements on the basis of the periodic repetition of their properties. ...

All matter in our environment is made up of basic units known as elements. Initially, only 31 chemical elements were ...

Everything in the universe is composed of basic elements, and at their smallest level, these elements are atoms. There are ...

Electronic Configuration is the arrangement of electrons in orbitals around an atomic nucleus. Electronic Configuration of a molecule refers to ...

Electron Configuration of an element tells us how electrons are filled inside various orbitals of the atom. The distribution of ...

S-block elements are those elements in which the last electron is present in the s-orbital. In the periodic table. They ...

What is Periodic Table? A periodic Table is the arrangement of all the elements in the known universe based on ...

What is Ionic Radius? Ionic radius is the distance from the nucleus of an ion up to which it has an ...

What are Noble Gases or Inert Gases? The elements in Group 18 of the periodic table are known as the ...

What is Ionization Enthalpy? The enthalpy change associated with the removal of the first electron from an isolated gaseous atom in ...

Electron Gain Enthalpy Definition Electron gain enthalpy is sometimes also referred to as Electron affinity although there is a minute ...

What is Electronegativity? The tendency of an atom in a molecule to attract the shared pair of electrons towards itself ...

Define Valency The combining capacity of an atom is known as its valency. The number of bonds that an atom ...

Introduction As per the modern periodic table, there are 118 elements that are known to man today, of which 24 ...

NCERT Solutions for Class 11 Chemistry Chapter 3: Classification of Elements and Periodicity in Properties Q-1) What is the basic ...

NCERT Exemplar Solutions of Chapter 3 Classification of Elements and Periodicity in Properties for Class 11 Chemistry Multiple Choice Questions ...