EASY
9th CBSE
IMPORTANT
Earn 100

Rutherford's α-particle scattering experiment led to the discovery of the .

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Important Questions on Structure Of The Atom

MEDIUM
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Short Answer Questions>Q 35
An element X has a mass number 4 and atomic number 2 Write the valency of this element? 
MEDIUM
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Long Answer Questions>Q 36
Why do Helium, Neon and Argon have a zero valency?
HARD
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Long Answer Questions>Q 37
The ratio of the radii of hydrogen atom and its nucleus is ~105. Assuming the atom and the nucleus to be spherical, what will be the ratio of their sizes?
HARD
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Long Answer Questions>Q 37

The ratio of the radii of hydrogen atom and its nucleus is ~105. Assuming the atom and the nucleus to be spherical, if atom is represented by planet earth 'Re' = 6.4×106 m, estimate the size of the nucleus. 

HARD
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Long Answer Questions>Q 38
Enlist the conclusions drawn by Rutherford from his α-ray scattering experiment. 
MEDIUM
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Long Answer Questions>Q 39
In what way is the Rutherford's atomic model different from that of Thomson's atomic model? 
HARD
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Long Answer Questions>Q 40
What were the drawbacks of Rutherford's model of an atom?
MEDIUM
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Long Answer Questions>Q 41
What are the postulates of Bohr's model of an atom?