Lakhmir Singh Class 9 Chemistry Solutions Chapter 3 - Atoms and Molecules - Free PDF Download
Vedantu.com - No.1 online tutoring company in India provides you the Free PDF download of Lakhmir Singh Chemistry Class 9 Science Solutions Chapter 3 - Atoms and Molecules solved by Expert Teachers. The textbook solutions is to help students to complete their homework and prepare to Score More marks in their exams. Register for our online tuitions with best Chemistry tutors across India. Students can also download NCERT Solution PDF for all subjects to prepare for their forthcoming exams. Download NCERT Solution for Class 9 Maths to help you to revise complete syllabus and score more marks in your examinations.
FAQs on Lakhmir Singh Chemistry Class 9 Solutions Chapter 3 - Atoms and Molecules
1. Why should I solve Lakhmir Singh Class 9?
Lakhmir Singh is a reliable source to prepare for Class 9 CBSE. Lakhmir Singh is a teacher who has written many books to refer to while preparing for secondary and higher secondary. Solving publication books gives you the confidence to solve the exam paper. Makes you realize your silly mistakes. As a result, you can avoid making them again. Lakhmir Singh is famous for Physics, Chemistry, and Biology. To ace your exam you should try to solve Lakhmir Singh of all three sub-subjects of science.
2. Is the atomic mass of any element the same?
The atomic mass of each element is unique to itself. The atomic mass of each element is different as each element carries atoms with a different number of neutrons, electrons, and protons. The mass of electrons is not taken into account while calculating atomic mass as its mass is so small that it can be neglected. Thus, we can say the mass of every atom lies in the nucleus of an atom. Mole and molecular mass are other ways to measure the mass of an element or a molecule.
3. Why do different elements have different chemical properties?
Though the basic structure and function of each element are the same, the number of neutrons, electrons, and protons present in the atoms of each element are different. The most influential feature of an atom is the number of electrons present in its outermost orbit. The number of electrons present in the outermost orbit defines an element’s valency. Valency plays a very important role in deciding both the chemical properties and physical properties of an element. Having a different number of electrons leads to having different chemical properties.
4. How should I prepare for Chapter 3 Chemistry CBSE Class 9?
Have the basic concepts of the entire chapter clear. Make notes on the Dalton Atomic Theory and revise them every day. Know the clear difference between atomic mass, molecular mass, and moles clearly. Chemistry is simple but requires attention to detail to crack the MCQs asked. Know the atomic mass and the atomic number of the first 30 elements in the periodic table. You should know the entire statements of Law of Conversion of Mass and Law of Constant Proportions.
5. Does the Avogadro number change?
Avogadro number represents the number of molecules present in each mole of every element. This number doesn’t change for any elements or atoms. This number is the same for every element present in the periodic table. With the help of this number, you can find the atomic mass. Moles of any element present in a reaction can be known with the help of the Avogadro number. No matter what, the Avogadro number never changes and always is represented by a single number.