Atomic Models
Physics ⇒ Modern Physics
Atomic Models starts at 9 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Atomic Models.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 12
Describe one way in which the quantum mechanical model of the atom differs from Bohr's model.
Explain why Rutherford's model was unstable according to classical physics.
In the context of atomic models, what is meant by 'quantization of angular momentum'?
State one major limitation of Bohr's atomic model.
State the main difference between the Bohr model and the quantum mechanical model of the atom.
Which experiment provided evidence for the existence of the atomic nucleus?
Which postulate of Bohr's model explains the stability of atoms?
Who proposed the first atomic model based on indivisible particles?
The emission spectrum of hydrogen consists of discrete lines because: (1) Electrons can have any energy. (2) Electrons jump between quantized energy levels. (3) The nucleus emits light. (4) Atoms are indivisible.
Which atomic model could not explain the results of the hydrogen spectrum experiment? (1) Bohr's model (2) Quantum mechanical model (3) Rutherford's model (4) All of the above
Which atomic model is based on the idea that electrons behave both as particles and waves? (1) Bohr model (2) Quantum mechanical model (3) Rutherford model (4) Dalton model
Which of the following atomic models first introduced the concept of quantized energy levels? (1) Dalton's model (2) Thomson's model (3) Rutherford's model (4) Bohr's model
According to Bohr's model, electrons revolve around the nucleus in ______ orbits without radiating energy.
According to the quantum mechanical model, electrons are found in ______ rather than fixed orbits.
Fill in the blank: The ______ model of the atom was the first to explain the stability of the hydrogen atom and its line spectrum.
In Bohr's model, the angular momentum of an electron in a permitted orbit is quantized and given by ______, where n is a positive integer.
State whether the following statement is true or false: The quantum mechanical model of the atom is based on Heisenberg's uncertainty principle.
True or False: According to Bohr's model, the energy of an electron increases as it moves to higher orbits.
True or False: According to Rutherford's model, electrons revolve around the nucleus in fixed paths called orbits.
True or False: In Rutherford's model, most of the mass of the atom is concentrated in the nucleus.
