CBSE Class 9 Science Structure of The Atom Worksheet Set C

Read and download free pdf of CBSE Class 9 Science Structure of The Atom Worksheet Set C. Download printable Science Class 9 Worksheets in pdf format, CBSE Class 9 Science Chapter 4 Structure of the Atom Worksheet has been prepared as per the latest syllabus and exam pattern issued by CBSE, NCERT and KVS. Also download free pdf Science Class 9 Assignments and practice them daily to get better marks in tests and exams for Class 9. Free chapter wise worksheets with answers have been designed by Class 9 teachers as per latest examination pattern

Chapter 4 Structure of the Atom Science Worksheet for Class 9

Class 9 Science students should refer to the following printable worksheet in Pdf in Class 9. This test paper with questions and solutions for Class 9 Science will be very useful for tests and exams and help you to score better marks

Class 9 Science Chapter 4 Structure of the Atom Worksheet Pdf

 
STRUCTURE OF ATOM

WORKSHEET- IV
 
1 Mark Questions:
 
1.On the basis of Thomson’s model of an atom, explain how the atom is neutral as a whole?
 
2.Where are electrons found in the atom?
 
3. What are canal rays?
 
4.Why is the nucleus of an atom positively charged?
 
5.Why did Rutherford select a gold foil in his α-ray scattering experiment?
 
6. If Mg2+ has 12 protons and 12 neutrons, what is its atomic number and mass number?
 
7.What is the defect of Rutherford's atom model?
 
8.Define valency & give one example of a monovalent element.
 
9.An atom of an element has 7 electrons in its L-shell,name the element and write it's atomic number?
 
10.Why Mg atom gets 2+ charge when it loses two electrons ?
 
11.Name the particles which determine the mass of an atom.
 
12.Which of the following are isotopes and which are isobars? Argon, Protium, Calcium, Deuterium.
 
2 Mark Questions:
 
1.What observations in a scattering experiment led Rutherford to make the following conclusions:
 
i) Most of the space in an atom is empty.
 
ii) Nucleus is positively charged.
 
iii)Whole mass of an atom is concentrated in its centre.
 
2.What are alpha particles? How are they related to Helium gas?
 
3. State the characteristics of nucleus of an atom.
 
4. Describe Bohr’s model of the atom?
 
5.The atomic number of chlorine is 17 and mass number is 35.
 
a. What would be the electronic configuration of a negatively charged chloride ion, Cl- ?
 
b. What would be the atomic number and mass number of Cl- ?
 
6.What is electronic configuration and how is the valency of an atom related to it ?
 
7.Which of the two would be chemically more reactive element, X of atomic number 18 or Y of atomic number 17 &why?
 
8.What are isotopes? Why do isotopes show similar chemical properties but they differ in physical properties?
 
9.Write isotopes of uranium and its uses.
 
10.Write one pair of Isobars. Why the chemical properties of isobars are not similar?
 
3 Mark Questions:
 
1. Explain Rutherford's gold foil experiment with diagram
 
2.Write three points of difference between isotopes and isobars.
 
3.The average atomic mass of a sample of an element ‘X’ is 16.2u. What is the percentage of each isotope 16X and 18X in the sample?
 
4.Define valency of an element. Find the valency of chlorine and magnesium.
 
5.i)What is the similarity in the electronic structure of the following set of atoms?
 
Lithium, Sodium & Potassium.
 
ii) Which of the above element is most reactive and why?

6.Complete the following table.


CBSE Class 9 Science Structure of The Atom Worksheet Set C


7.Give reason for the following
 
a) An atom is electrically neutral
 
b) Noble gases show least reactivity
 
c) Nucleus of an atom is heavy and positively charged.
 
d) Ions are more stable than atoms.
 
8. An element has an atomic number 12 and mass number 26.Draw a diagram showing the distribution of electrons in the orbits and the nuclear composition of the neutral atom. If this element X combines with another element Y whose electronic configuration is 2,8,7, what will be the formula of the compound thus formed?
 
9. Name the Scientists who have contributed the following towards the understanding of the atomic structure.
 
i) Discovery of electrons
 
ii) Canal rays
 
iii) Concept of nucleus
 
iv) Stationary orbits
 
v) Indivisibility of atoms
 
vi) Neutron
 
Value Based Question :
 
1.In Kaiga nuclear Power Corporation building, drinking water was found to be contaminated with tritium . It is highly radioactive.
 
a) What is tritium? Write its atomic number and mass number.
 
b) It is an isotope of which element?
 
c) Name the other two isotopes of the same element.
 
d) What precautions do you suggest so that this type of incident does not occur again?
 
e) What is meant by radioactive?
 
2. Most of the children burst crackers during Diwali. It creates a lot of noise pollution and air pollution. Asthma patients have tough time during Diwali. Many children get hurt due to mishandling of fire crackers. Poisonous gases like sulphur dioxide ,phosphorous pentoxide are formed.
 
a) Name two elements present in gun powder used in crackers.
 
b) Government has banned bursting of fire crackers after 10pm.Do you agree? Give reason.
 
c) Why should we not wear synthetic clothes while bursting crackers?



Please click on below link to download CBSE Class 9 Science Structure of The Atom Worksheet Set C

Chapter 01 Matter in Our Surroundings
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set A
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set B
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set C
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set D
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set E
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set F
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set G
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set H
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set I
Chapter 02 Is Matter Around Us Pure
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set A
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set B
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set C
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set C
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set D
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set D
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set E
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set E
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set F
Chapter 03 Atoms and Molecules
CBSE Class 9 Science Atoms and Molecules Worksheet Set A
CBSE Class 9 Science Atoms and Molecules Worksheet Set B
CBSE Class 9 Science Atoms and Molecules Worksheet Set C
CBSE Class 9 Science Atoms and Molecules Worksheet Set D
CBSE Class 9 Science Atoms and Molecules Worksheet Set E
CBSE Class 9 Science Atoms and Molecules Worksheet Set F
CBSE Class 9 Science Atoms and Molecules Worksheet Set G
CBSE Class 9 Science Atoms and Molecules Worksheet Set H
Chapter 04 Structure of the Atom
CBSE Class 9 Science Structure of The Atom Worksheet Set A
CBSE Class 9 Science Structure of The Atom Worksheet Set B
CBSE Class 9 Science Structure of The Atom Worksheet Set C
CBSE Class 9 Science Structure of The Atom Worksheet Set D
Chapter 05 The Fundamental Unit of Life
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set A
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set B
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set C
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set D
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set E
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set F
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set G
Chapter 06 Tissues
CBSE Class 9 Science Plant Tissues Worksheet Set A
CBSE Class 9 Science Tissue Worksheet Set C
CBSE Class 9 Science Tissue Worksheet Set D
CBSE Class 9 Science Tissue Worksheet Set E
CBSE Class 9 Science Tissue Worksheet Set F
CBSE Class 9 Science Tissues Worksheet Set A
CBSE Class 9 Science Tissues Worksheet Set B
Chapter 07 Diversity In Living Organisms
CBSE Class 9 Science Diversity in Living Organism Worksheet Set A
CBSE Class 9 Science Diversity in Living Organism Worksheet Set B
CBSE Class 9 Science Diversity In Living Organisms Worksheet Set C
CBSE Class 9 Science Diversity In Living Organisms Worksheet Set D
CBSE Class 9 Science Diversity In Living Organisms Worksheet Set E
CBSE Class 9 Science Diversity In Living Organisms Worksheet Set F
Chapter 08 Motion
CBSE Class 9 Science Motion Worksheet Set A
CBSE Class 9 Science Motion Worksheet Set B
CBSE Class 9 Science Motion Worksheet Set C
CBSE Class 9 Science Motion Worksheet Set D
CBSE Class 9 Science Motion Worksheet Set E
CBSE Class 9 Science Motion Worksheet Set F
CBSE Class 9 Science Motion Worksheet Set G
CBSE Class 9 Science Motion Worksheet Set H
CBSE Class 9 Science Motion Worksheet Set I
CBSE Class 9 Science Motion Worksheet Set J
Chapter 09 Force and Laws of Motion
CBSE Class 9 Science Force and Laws of Motion Worksheet Set A
CBSE Class 9 Science Force and Laws of Motion Worksheet Set B
CBSE Class 9 Science Force and Laws of Motion Worksheet Set C
CBSE Class 9 Science Force and Laws of Motion Worksheet Set D
CBSE Class 9 Science Force and Laws of Motion Worksheet Set E
CBSE Class 9 Science Force and Laws of Motion Worksheet Set F
Chapter 10 Gravitation
CBSE Class 9 Science Gravitation Worksheet Set A
CBSE Class 9 Science Gravitation Worksheet Set B
CBSE Class 9 Science Gravitation Worksheet Set C
CBSE Class 9 Science Gravitation Worksheet Set D
Chapter 11 Work and Energy
CBSE Class 9 Science Work and Energy Worksheet Set A
CBSE Class 9 Science Work and Energy Worksheet Set B
Chapter 12 Sound
CBSE Class 9 Science Sound Worksheet Set A
CBSE Class 9 Science Sound Worksheet Set B
Chapter 13 Why Do We Fall Ill
CBSE Class 9 Science Why Do We Fall ill Worksheet Set A
CBSE Class 9 Science Why Do We Fall ill Worksheet Set B
Chapter 14 Natural Resources
CBSE Class 9 Science Natural Resource Worksheet Set C
CBSE Class 9 Science Natural Resource Worksheet Set D
CBSE Class 9 Science Natural Resource Worksheet Set E
CBSE Class 9 Science Natural Resource Worksheet Set F
CBSE Class 9 Science Natural Resources Worksheet Set A
CBSE Class 9 Science Natural Resources Worksheet Set B
Chapter 15 Improvement in Food Resources
CBSE Class 9 Science Improvent in Food Resources Worksheet Set A
CBSE Class 9 Science Improvent in Food Resources Worksheet Set B
z More Worksheets for Class 9 Science
CBSE Class 9 Science Lab Worksheet Different Chemical Changes
CBSE Class 9 Science Lab Worksheet law of Conservation of Mass
CBSE Class 9 Science Lab Worksheet Melting Point of Ice
CBSE Class 9 Science Lab Worksheet Preparation of Mixture and Compound
CBSE Class 9 Science Lab Worksheet Separation of Different Components
CBSE Class 9 Science Lab Worksheet True Solution Colloid Suspension
CBSE Class 9 Science Worksheet Set A
CBSE Class 9 Science Worksheet Set B
CBSE Class 9 Science Worksheet Set C
CBSE Class 9 Science Worksheet Set D
CBSE Class 9 Science Worksheet Set E
CBSE Class 9 Science Worksheet Set F
CBSE Class 9 Science Worksheet Set G
CBSE Class 9 Science Worksheet Set H
CBSE Class 9 Science Worksheet Set I
CBSE Class 9 Science Worksheet Set J
CBSE Class 9 Science Worksheet Set K
CBSE Class 9 Science Worksheet Set L
CBSE Class 9 Science Worksheet Set M Solved
CBSE Class 9 Science Worksheet Set N Solved
CBSE Class 9 Science Worksheet Set O Solved
CBSE Class 9 Science Worksheet Set P Solved
CBSE Class 9 Science Worksheet Set Q Solved
CBSE Class 9 Science Worksheet Set R Solved
CBSE Class 9 Science Worksheet Set S Solved
CBSE Class 9 Science Worksheet Set T Solved
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Chapter 4 Structure of the Atom CBSE Class 9 Science Worksheet

The above practice worksheet for Chapter 4 Structure of the Atom has been designed as per the current syllabus for Class 9 Science released by CBSE. Students studying in Class 9 can easily download in Pdf format and practice the questions and answers given in the above practice worksheet for Class 9 Science on a daily basis. All the latest practice worksheets with solutions have been developed for Science by referring to the most important and regularly asked topics that the students should learn and practice to get better scores in their examinations. Studiestoday is the best portal for Printable Worksheets for Class 9 Science students to get all the latest study material free of cost. Teachers of studiestoday have referred to the NCERT book for Class 9 Science to develop the Science Class 9 worksheet. After solving the questions given in the practice sheet which have been developed as per the latest course books also refer to the NCERT solutions for Class 9 Science designed by our teachers. After solving these you should also refer to Class 9 Science MCQ Test for the same chapter. We have also provided a lot of other Worksheets for Class 9 Science which you can use to further make yourself better in Science.

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