MEDIUM
9th CBSE
IMPORTANT
Earn 100

Nucleus is positively charged whereas electrons are negatively charged but Niels Bohr proved that electrons never fall into the nucleus. Atom is always stable.
What lesson do you learn from this example for your day-to-day life?
 

Important Questions on Structure of the Atom

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>Practice Questions>Q 3
The journey from Dalton's model of atom to Thomson's model of atom to Rutherford's model of atom to Bohr's model of atom is a long and strenuous one. Each model has its merits and drawbacks. Even Bohr's model of atom is not the final answer to the structure of atom.
Give distinguishing features between Thomson's model and Rutherford's model of atom.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>Practice Questions>Q 3
The journey from Dalton's model of atom to Thomson's model of atom to Rutherford's model of atom to Bohr's model of atom is a long and strenuous one. Each model has its merits and drawbacks. Even Bohr's model of atom is not the final answer to the structure of atom.
State a defect of Bohr's model of atom.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>Practice Questions>Q 3
The journey from Dalton's model of atom to Thomson's model of atom to Rutherford's model of atom to Bohr's model of atom is a long and strenuous one. Each model has its merits and drawbacks. Even Bohr's model of atom is not the final answer to the structure of atom.
What value can you learn from the ongoing journey of the development of atomic structure from Dalton's model of atom to the present model of atom? Is this value applicable to the improvement of the standard of our life?
 
HARD
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>Higher Order Thinking Skills (HOTS) Questions>Q 1
Can you conclude that proton and neutron are elementary fundamental particles? Give reasons.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>Higher Order Thinking Skills (HOTS) Questions>Q 2
Name the particles present in the nucleus of an atom, other than proton and neutron.
HARD
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>Higher Order Thinking Skills (HOTS) Questions>Q 3
Which element will be more reactive- the element whose atomic number is 18 or the one whose atomic number is 19? Give reasons.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>Higher Order Thinking Skills (HOTS) Questions>Q 4
Which of the following elements have only two electrons in their outermost orbit?
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>Higher Order Thinking Skills (HOTS) Questions>Q 5
The atom of which of the following does not contain a neutron in the nucleus?