HARD
9th CBSE
IMPORTANT
Earn 100

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?

Important Questions on Structure Of The Atom

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? 
HARD
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Long Answer Questions>Q 42
Show diagrammatically, the electron distributions in sodium atom and sodium ion, and also give their atomic number.
HARD
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Long Answer Questions>Q 43
In the Gold foil experiment of Geiger and Marsden, that paved the way for Rutherford's model of an atom, ~ 1.00 % of the α -particles were found to deflect at angles >50° If one mole of α-particles were bombarded on the gold foil, compute the number of α-particles that would deflect at angles less than 50° .