Bohr's Atomic Model

Who proposed the Bohr model of the atom?

• Albert Einstein

• Niels Bohr

• Ernest Rutherford

• J.J. Thomson

What did Bohr's model introduce that Rutherford's model did not?

• Electrons orbit the nucleus in fixed orbits

• The nucleus carries a positive charge

• Electrons are not a part of the atom

• The atom has no structure

According to Bohr's model, how are electrons arranged?

• In random orbits

• In concentric circles around the nucleus

• In a cloud surrounding the nucleus

• On a straight line from the nucleus

What is the main assumption of the Bohr model regarding electron energy?

• Electrons do not have specific energy levels

• Electrons emit energy when in an orbit

• Electrons can only exist at specific energy levels

• Electrons can move freely between any two energy levels

What happens when an electron jumps from a higher energy level to a lower one in the Bohr model?

• The atom absorbs energy

• The atom emits light (photon)

• Electron gains energy

• The atom splits into two

Which element's spectrum is primarily explained by the Bohr model?

• Helium

• Hydrogen

• Oxygen

• Carbon

What is a major limitation of the Bohr atomic model?

• It cannot explain the spectrum of elements with more than one electron

• It does not take into account the existence of protons

• It cannot explain the motion of electrons

• It is based on the idea of fixed orbits, which is inaccurate

According to the Bohr model, what happens to the energy of an electron when it moves to a higher orbit?

• It loses energy

• It gains energy

• It maintains the same energy

• Energy depends on the mass of the atom

What does the Bohr model say about the stability of electrons in their orbits?

• Electrons spiral inward and eventually collide with the nucleus

• Electrons are stable as long as they are in their orbits

• Electrons move randomly and cannot be stable

• Electrons move in elliptical orbits and are unstable

In the Bohr model, what causes the lines in the emission spectrum of hydrogen?

• Electron absorption

• Electron transitions between fixed orbits

• Collisions of electrons with other atoms

• Proton transitions in the nucleus