Bohr's Atomic Model SK015

Which of the following does the nucleus contain?

• protons and electrons

• neutrons and electrons

• protons and neutrons

In the Bohr model, how do electrons travel?

• Electrons move in and out of the nucleus

• Electrons do not move

• Electrons move in circular orbits around the nucleus

• Electrons move in a straight line

Which of the following is the first postulate of Bohr's atomic model?

• Electron moves in circular orbits around the nucleus

• The energy of an electron in a hydrogen atom is quantised

• If energy is supplied, electron absorbs the energy and is promoted from a lower energy level to a higher energy level

• At excited state, the electron is unstable. It will fall back to lower energy level and releases a specific amount of energy (photon) in the form of light

Which of the following is the second postulate of Bohr's atomic model?

• Electron moves in circular orbits around the nucleus

• The energy of an electron in a hydrogen atom is quantised

• If energy is supplied, electron absorbs the energy and is promoted from a lower energy level to a higher energy level

• At excited state, the electron is unstable. It will fall back to lower energy level and releases a specific amount of energy (photon) in the form of light

Which of the following is the third postulate of Bohr's atomic model?

• Electron moves in circular orbits around the nucleus

• The energy of an electron in a hydrogen atom is quantised

• If energy is supplied, electron absorbs the energy and is promoted from a lower energy level to a higher energy level

• At excited state, the electron is unstable. It will fall back to lower energy level and releases a specific amount of energy (photon) in the form of light

Which of the following is the fourth postulate of Bohr's atomic model?

• Electron moves in circular orbits around the nucleus

• The energy of an electron in a hydrogen atom is quantised

• If energy is supplied, electron absorbs the energy and is promoted from a lower energy level to a higher energy level

• At excited state, the electron is unstable. It will fall back to lower energy level and releases a specific amount of energy (photon) in the form of light

What is photon?

• The rate at which a waves energy flows

• Packets of electromagnetic radiation emitted when an electron transitions between different energy levels in an atom

• when radiation burst through electric waves

Bohr states that when atom absorb precise amount of energy, the electron will

• falls into the nucleus

• falls to the ground state

• moves to another atom

• excites to higher state of energy

In which state does an electron have the least amount of energy?

• Excited state

• Ground state

• Orbital

• Bohr model

For an electron to change from ground state to an excited stated it must...

• Absorb energy
• Release energy