NEET GURU

Chemical Bonding and Molecular Structure Simplified: A Comprehensive NEET Exam Guide Chemical bonding and molecular structure are fundamental concepts in chemistry that form the basis of understanding the properties and behavior of matter. For NEET exam aspirants, a thorough understanding of these topics is crucial. In this article, we will delve into the essential aspects of chemical bonding and molecular structure, providing detailed explanations and including relevant formulas. 1. Kossel Lewis Approach: The Kossel Lewis approach, also known as Lewis dot structures, helps represent the valence electrons of atoms using dots. The number of valence electrons for each element can be determined from its group number in the periodic table. To draw a Lewis dot structure: - Write the symbol of the element. - Place dots around the symbol, representing valence electrons. - Follow the octet rule (except for hydrogen and helium), which states that atoms tend to gain, lose, or share electrons to ...

Structure of atom Mind map Atomic structure class 11 Chemistry Best revision shortnotes PDF is given at end of this page👇👇 Atoms are the building blocks of elements. They are the smallest parts of an element that chemically react. The first atomic theory, proposed by John Dalton in 1808, regarded atom as the ultimate indivisible particle of matter. Towards the end of the nineteenth century, it was proved experimentally that atoms are divisible and consist of three fundamental particles: electrons, protons and neutrons. Atoms are the basic building blocks of all matter. They are composed of three main components: protons, neutrons, and electrons.  Protons are positively charged particles located in the nucleus of an atom. The number of protons in an atom is called its atomic number and determines the element it belongs to.  Neutrons are electrically neutral particles also found in the nucleus of an atom. They help to keep the nucleus stable. The total number of neutrons and p...

Periodic Table - Classification of Elements and Periodic Properties mind map Class 11 PDF is given at end of this page In this Unit, you have studied the development of the Periodic Law and the Periodic Table. Mendeleev’s Periodic Table was based on atomic masses. Modern Periodic Table arranges the elements in the order of their atomic numbers in seven horizontal rows (periods) and eighteen vertical columns. Atomic numbers in a period are consecutive, whereas in a group they increase in a pattern.  The periodic table is a tabular arrangement of elements that organizes them according to their atomic number, electron configuration, and recurring chemical properties. The table is organized into vertical columns (called groups) and horizontal rows (called periods). Each element in the periodic table is represented by its atomic symbol, atomic number, and its average atomic mass. The periodic table was first proposed by Russian chemist Dmitri Mendeleev in 1869. He organized the 63 known...

Human physiology contains a total of 7 chapters in NCERT textbook. The first chapter is digestion and absorption which tells us about our digestive system. The process of conversion of complex food materials into simple forms is called digestion. Human digestive system is divided into two parts -  the alimentary canal and the associated glands. Our digestive system is complete with two openings - anterior mouth and posterior anus. The mouth leads to oral cavity also known as buccal cavity. This cavity contains teeth and tongue. There are three pairs salivary gland situated just outside the buccal cavity. These are sub maxillary gland (in on the lower jaw) parotid gland (on the cheeks) and sub lingual gland (under the tongue). The secretions from the salivary gland comes to buccal cavity through ducts. The Saliva mainly consist of salivary amylase, some ions like sodium ion potassium ion etc. and Lysozyme enzyme. 30% of the total starch is converted into glucose in mouth by using sa...

PDF is given at end of this page 👇👇. Topic from this chapter that you must study before exam are also given below. Subscribe to my other channel - click here Most asked questions - 1. Mole concept 2. Laws of Chemical combination This chapters has following important topics -  In this unit, you'll study about - • Characteristics of three states of matter • Classification of different substances into elements, compounds and mixtures • Use of scientific notations and determining  significant figures • Precision and accuracy; • SI base units and conversion  of physical quantities from one system of units to another • Laws of chemical combination • Significance of atomic mass, average atomic mass, molecular mass and formula mass • Mole and Molar mass; • Calculation of mass percent of component elements constituting a compound • Empirical formula and molecular formula • Stoichiometry The study of chemistry is very important as its domain encompasses every sphere of life. Che...