Toppers Study Toppers Study Toppers StudyGet complete NCERT Solutions for 9 Science 4. Structure of The Atom with detailed explanations. Easy-to-understand answers to help students study effectively and score better.
Get complete NCERT Solutions for 9 Science 4. Structure of The Atom with detailed explanations. Easy-to-understand answers to help students study effectively and score better.
Preparing for exams becomes easier with Additional -Questions. Whether you are studying for board exams or mid-term exams, 9 Science Chapter 4. Structure of The Atom solutions provide quick revising points, well-structured answers, and additional practice material to help you score better.
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Ques.1 – Why does an atom have neutral charge?
Ans. – As an atom have equal protons and electrons. The protons carry positive charge and electrons carry negative charge. Thus an atom has neutral charge.
Ques.2 – What is an alpha particle?
Ans. – Alpha particle is a double charged helium particle which has positive charge.
Ques.3 – Write the name of sub-atomic particles of an atom.
Ans. –
Ques.4 – Name the founder of electron.
Ans. – J. J. Thomson
Ques.5 – What is canal rays?
Ans. – Canal rays were positively charged radiations of a gas discharged from the anode of discharged canal which ultimately led to the discovery of another sub-atomic particle.
Ques.6 – Whom does credit for discovery of proton go?
Ans – E. Goldstein.
Ques.7 – What are the limitations of J.J. Thomson’s model of the atom?
Ans. – Thomson’s model explained that atoms are electrically neutral, the results of experiments carried out by other scientists could not be explained by this model,
Ques.8 – What are the limitations of Rutherford’s model of the atom?
Ans. – According to electromagnetic principle Rutherford’s model of the atom makes unstable to an atom while an atom is stable.
Ques.9 – What postuletes Neils Bohr put about the model of an atom?
Ans. – Neils Bohr put forward the following postulates about the model of an atom:
Ques.10 – Describe Rutherford’s model of the atom.
Ans. – Rutherford put forward the nuclear model of an atom, which had the following features:
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In short, Additional -Questions for 9 Science Chapter 4. Structure of The Atom are a complete study package. With quick revising points, NCERT exercises, and additional important questions, you can prepare effectively for exams. Make these solutions your study companion and excel in your academic journey.
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