Class 11

Molecular mass: The mass of a single molecule in a compound is defined as the mass of the compound. Because of the isotopes, the atomic mass of the elements varies. The atomic mass unit (amu) is used to measure molecular mass. Amu is an abbreviation for atomic mass units. Molar mass: It is defined as […]

Introduction We as a whole need to realize that in a specific substance the number of particles is available. Particles and atoms are extremely little, both in size and mass. The molar mass of a substance refers to the total mass of one mole of a substance. Associate the nuclear masses (nuclear loads) of all

The concept of mesomeric effect, mesomerism and Mesomers was laid down by scientist Ingold in the year 1938.   Apparently, Mesomer is a connotation of the word resonance whose idea was given by the scientist Pauling. It is the property that is possessed by the functional groups in a chemical compound.    The mesomeric effect is

The outermost shell of Group 1 elements has one electron, and unlike most other atoms, this electron may wander away from the nucleus. Consequently, elements in Group 1 have higher atomic radii than elements in their respective periods, and the greater atomic size weakens atomic forces. Because Group 1 elements have wide atomic radii between

An atom’s size and electron configuration are factors that affect the magnetic properties of a compound. The number of unpaired electrons in a compound determines its magnetic properties because magnetism is based on electron spin. The magnetism of the transition metals (or d-block elements) is examined in this section. They are characterised by having many

Different materials show different types of magnetic properties when exposed to magnetic fields. The property of magnetism arises due to the presence of electrons in an atom or molecule. Each electron within an atom acts like a small magnet. In fact electrons can also be referred to as small loops of current that have the

Introduction  The VSEPR theory was introduced by Powell and Sidgwick in 1940. This theory is mainly used for predicting a molecule’s shape from the electron pairs. In this article, we will discuss the VSEPR theory, Linear Shape of molecules and other related topics.  VSEPR theory  The Valence Shell Electron Pair Repulsion Theory, commonly known as

Many significant things happen around us that go unnoticed, such as the phenomena of emission and absorption in the atom. The feature of matter that causes the spontaneous release of energetic subatomic particles is known as radioactivity. It is impossible to predict which atom from a collection of atoms will disintegrate at a given time

The kinetic theory of gases is a simple, classical model of the thermodynamic behaviour of gases. It has established many fundamental thermodynamic concepts and is also historically significant.  We use this theoretical model to study the action and reaction of gas molecules and the thermodynamic behaviour of gases. The model describes the composition of gas

Every element in the periodic table has Ionisation Energy, which can also be associated with the ionisation potential. So, what is ionisation energy?  It is the energy required to remove an electron from an atom and generate an ion. Usually, we express it in kJ/mol, which is calculated on the basis of an isolated atom