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Organic chemistry is the study of the structure, properties, composition, reactions, and preparation of carbon-containing compounds, which include not only hydrocarbons but also compounds with any number of other elements, including hydrogen, nitrogen, oxygen, halogens, phosphorus, silicon, and sulphur.

Elements whose f orbital gets filled up by electrons are called f block elements. These elements have electrons (1 to 14) in the f orbital, (0 to 1) in the d orbital of the penultimate energy level and in the outermost orbital. There are two series in the f block corresponding to the filling up of 4f and 5f orbitals.

The d-block elements are also known as the transition metals. They are located in the middle of the periodic table, from group 3 to 12. These elements have partially filled d-orbitals and exhibit a wide range of properties.

The d-block elements are also known as the transition metals. They are located in the middle of the periodic table, from group 3 to 12. These elements have partially filled d-orbitals and exhibit a wide range of properties.

The periodic table is a tabular arrangement of chemical elements, organized by their atomic number, electron configuration, and recurring chemical properties. It's a fundamental tool in chemistry and helps us understand the relationships between different elements.

The mole concept is a fundamental concept in chemistry that provides a way to count and measure the amount of substance in a quantitative manner. It is based on the Avogadro's number, which is approximately 6.022 x 10^23. Here are some key points to include in your handwritten notes.

Ionic equilibrium is a branch of chemistry that deals with the behavior of ions and the formation and dissociation of ionic compounds in solutions. It primarily focuses on the equilibrium reactions involving ions in aqueous solutions, their solubility, and the calculations related to their concentration.

Electrochemistry is a branch of chemistry that explores the relationship between chemical reactions and electricity. This chapter delves into the fundamental principles and concepts related to electrochemical processes. It is a crucial topic that not only contributes to a deeper understanding of chemical reactions but also finds practical applications in various fields, including batteries, corrosion prevention, and electroplating.

The chapter on Alternating Current (AC) is a part of the 12th-grade physics curriculum and not chemistry. It deals with the fundamental principles and concepts related to alternating current in electrical circuits. Here's a brief overview of the key topics covered in this chapter.

The "d-block Elements" is a crucial chapter in 12th-grade chemistry, focusing on the transition elements or transition metals found in the periodic table. These elements are located in the d-block, between the s-block (groups 1 and 2) and the p-block (groups 13 to 18) elements. Here is a short description of this chapter.