Class 9 > Science Class 9 > Worksheet: Atoms and Molecules
Worksheet: Atoms and Molecules - Science Class 9
Q.1. The maximum number of electrons in L shell is
(a) 8
(b) 18
(c) 28
(d) 38
Q.2. Which of the following statements is correct?
(a) Cathode rays travel in straight line and have momentum.
(b) Cathode rays travel in straight line and have no momentum
(c) Cathode rays do not travel in straight line but have Momentum.
(d) Cathode rays do not travel in straight line and have no momentum.
Q.3. Oxygen is –
(a) Monovalent
(b) Bivalent
(c) Trivalent
(d) Tetravalent
Q.4. Molecular mass of water (H2O) is
(a) 18g
(b) 8g
(c) 33g
(d) 34g
Q.5. Atomicity of chlorine and Argon is
(a) Diatomic and Monoatomic
(b) Monoatomic and Diatomic
(c) Monoatomic and Monoatomic
(d) Diatomic and Diatomic
Q.6. Stat the properties of cathode rays?
Q.7. Define the terms:
(a) Atomic number
(b) Mass number
Q.8. State the law of constant Proportion?
Q.9. Which postulate of Dalton’s atomic theory can explain the law of definite proportions?
Q.10. Which element will be more reactive and why → the element whose atomic number is 10 or the one whose atomic number is 11?
Q.11. What is the mass of 0.2 mole of oxygen atoms?
Q.12. The mass of an atom of element (X) is 2.0 × 10–23 g. Calculate its atomic mass.
Q.13. Calculate the molar mass of Nitric acid.
Q.14. Explain why the number of atoms in one mole of hydrogen gas is double the number of atoms in one mole of helium gas.
Q.15. If the valency of carbon is 4 and that of sulphur is 2, what is the chemical formula and name of the compound formed between carbon and sulphur atoms?
The document Worksheet: Atoms and Molecules | Science Class 9 is a part of the Class 9 Course Science Class 9.
All you need of Class 9 at this link: Class 9
|
66 videos|355 docs|97 tests
|
FAQs on Worksheet: Atoms and Molecules - Science Class 9
| 1. What is an atom? |  |
Ans. An atom is the smallest unit of matter that retains the chemical properties of an element. It consists of a nucleus, which contains positively charged protons and uncharged neutrons, surrounded by negatively charged electrons.
| 2. How are atoms and molecules related? | |
Ans. Atoms are the building blocks of molecules. Molecules are formed when two or more atoms chemically combine together through chemical bonds. These atoms can be of the same element or different elements.
| 3. What is the difference between an atom and a molecule? | |
Ans. An atom is a single particle that cannot be divided into smaller units without losing its chemical properties. On the other hand, a molecule is a group of atoms held together by chemical bonds. A molecule can consist of two or more atoms.
| 4. How do atoms and molecules behave in chemical reactions? | |
Ans. In a chemical reaction, atoms and molecules rearrange to form new substances. The bonds between atoms in the reactant molecules break, and new bonds form between the atoms to create the products. The total number of atoms remains the same, but their arrangement changes.
| 5. Can atoms and molecules be seen with a microscope? | |
Ans. Atoms and molecules are too small to be seen with a traditional light microscope. However, they can be visualized using advanced techniques such as scanning tunneling microscopy or atomic force microscopy. These techniques allow scientists to observe individual atoms and molecules on a surface.
About this Document
|
4.92/5 Rating |
|
Dr Manju Sen |
Document Description: Worksheet: Atoms and Molecules for Class 9 2023 is part of Science Class 9 preparation.
The notes and questions for Worksheet: Atoms and Molecules have been prepared according to the Class 9 exam syllabus. Information about Worksheet: Atoms and Molecules covers topics
like and Worksheet: Atoms and Molecules Example, for Class 9 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Worksheet: Atoms and Molecules.
Introduction of Worksheet: Atoms and Molecules in English is available as part of our Science Class 9
for Class 9 & Worksheet: Atoms and Molecules in Hindi for Science Class 9 course.
Download more important topics related with notes, lectures and mock test series for Class 9
Exam by signing up for free. Class 9: Worksheet: Atoms and Molecules | Science Class 9
Description
Full syllabus notes, lecture & questions for Worksheet: Atoms and Molecules | Science Class 9 - Class 9 | Plus excerises question with solution to help you revise complete syllabus for Science Class 9 | Best notes, free PDF download
Information about Worksheet: Atoms and Molecules
In this doc you can find the meaning of Worksheet: Atoms and Molecules defined & explained in the simplest way possible. Besides explaining types of
Worksheet: Atoms and Molecules theory, EduRev gives you an ample number of questions to practice Worksheet: Atoms and Molecules tests, examples and also practice Class 9
tests
|
66 videos|355 docs|97 tests
|
Download as PDF
Up next
|
Explore Courses for Class 9 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Download free EduRev App
Track your progress, build streaks, highlight & save important lessons and more!
Related Searches
Exam
,Worksheet: Atoms and Molecules | Science Class 9
,Summary
,video lectures
,Semester Notes
,Important questions
,Viva Questions
,ppt
,shortcuts and tricks
,Free
,Worksheet: Atoms and Molecules | Science Class 9
,past year papers
,Worksheet: Atoms and Molecules | Science Class 9
,Objective type Questions
,MCQs
,practice quizzes
,Extra Questions
,mock tests for examination
,study material
,Previous Year Questions with Solutions
,Sample Paper
;
Additional Information about Worksheet: Atoms and Molecules for Class 9 Preparation
Worksheet: Atoms and Molecules Free PDF Download
The Worksheet: Atoms and Molecules is an invaluable resource that delves deep into the core of the Class 9 exam.
These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
With the help of these notes, you can grasp complex subjects quickly, revise important points easily,
and reinforce your understanding of key concepts. The study notes are presented in a concise and easy-to-understand manner,
allowing you to optimize your learning process. Whether you're looking for best-recommended books, sample papers, study material,
or toppers' notes, this PDF has got you covered. Download the Worksheet: Atoms and Molecules now and kickstart your journey towards success in the Class 9 exam.
Importance of Worksheet: Atoms and Molecules
The importance of Worksheet: Atoms and Molecules cannot be overstated, especially for Class 9 aspirants.
This document holds the key to success in the Class 9 exam.
It offers a detailed understanding of the concept, providing invaluable insights into the topic.
By knowing the concepts well in advance, students can plan their preparation effectively.
Utilize this indispensable guide for a well-rounded preparation and achieve your desired results.
Worksheet: Atoms and Molecules Notes
Worksheet: Atoms and Molecules Notes offer in-depth insights into the specific topic to help you master it with ease.
This comprehensive document covers all aspects related to Worksheet: Atoms and Molecules.
It includes detailed information about the exam syllabus, recommended books, and study materials for a well-rounded preparation.
Practice papers and question papers enable you to assess your progress effectively.
Additionally, the paper analysis provides valuable tips for tackling the exam strategically.
Access to Toppers' notes gives you an edge in understanding complex concepts.
Whether you're a beginner or aiming for advanced proficiency, Worksheet: Atoms and Molecules Notes on EduRev are your ultimate resource for success.
Worksheet: Atoms and Molecules Class 9 Questions
The "Worksheet: Atoms and Molecules Class 9 Questions" guide is a valuable resource for all aspiring students preparing for the
Class 9 exam. It focuses on providing a wide range of practice questions to help students gauge
their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation.
The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level.
Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.
Study Worksheet: Atoms and Molecules on the App
Students of Class 9 can study Worksheet: Atoms and Molecules alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Worksheet: Atoms and Molecules,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Worksheet: Atoms and Molecules is prepared as per the latest Class 9 syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup
