X-rays and Atomic Models

What year was Bohr's atomic model proposed?

• 1910

• 1905

• 1913

• 1920

What concept did Bohr's model introduce regarding electrons?

• Electrons can exist anywhere in the atom without restriction.

• Electrons are randomly distributed in an atom.

• Electrons only exist in pairs within an atom.

• Electrons occupy specific energy levels or orbits.

How do electrons transition between energy levels in Bohr's model?

• Electrons can only transition by colliding with other particles.

• Electrons transition by moving in circular orbits without energy exchange.

• Electrons transition by absorbing or emitting photons corresponding to energy level differences.

• Electrons transition by changing their mass.

What is the significance of quantized energy levels?

• They explain the discrete energy states in atoms, leading to atomic spectra and chemical behavior.

• They are irrelevant to the behavior of electrons in atoms.

• They suggest that energy can only be absorbed in large quantities.

• They indicate that energy levels are continuous and not discrete.

Why do electrons in stable orbits not radiate energy?

• Electrons in stable orbits are constantly accelerating.

• Electrons in stable orbits do not radiate energy because they occupy quantized energy levels and are not accelerating.

• Electrons radiate energy due to their high speed in orbits.

• Electrons lose energy because they are attracted to the nucleus.

For which atom was Bohr's model primarily formulated?

• Helium

• Oxygen

• Carbon

• Hydrogen

What type of radiation are X-rays classified as?

• Beta particles

• Electromagnetic radiation

• Alpha particles

• Nuclear radiation

What are the two main types of X-rays?

• Ultra X-rays and Nano X-rays

• Alpha X-rays and Beta X-rays

• Gamma X-rays and Delta X-rays

• Soft X-rays and Hard X-rays

How does the emission spectrum relate to electron transitions?

• The emission spectrum is unrelated to electron transitions.

• Electron transitions absorb photons, creating the emission spectrum.

• The emission spectrum is produced by photons emitted during electron transitions between energy levels.

• The emission spectrum is only produced at absolute zero temperature.

What role do photons play in electron transitions?

• Photons absorb energy from electrons during transitions.

• Photons are responsible for the decay of electrons to lower energy levels.

• Photons facilitate electron transitions by providing the energy needed for electrons to move between energy levels.

• Photons create new energy levels for electrons to occupy.