1. What element is represented in this Bohr Model?

• Carbon

• Hydrogen

• Aluminum

• Lithium

Tags

NGSS.MS-PS1-1

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

What is n defined as in the Bohr's atomic model?

• a letter

• Principal quantum number

• Principal quantum variable

• a quantitiy

What is the spectrum region for Balmer series?

• Visible

• Ultraviolet

• Infrared

• X-rays

Tags

NGSS.HS-PS4-3

How the second line in the Balmer series of the hydrogen spectrum is formed?

• n=6 to n=4

• n=3 to n=1

• n=5 to n=3

• n=4 to n=2

For Lyman series, the first line is the

• highest energy

• highest frequency

• longest wavelength

• none of the above

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

NGSS.HS-PS4-4

Which line spectrum series in ultraviolet region?

• Lyman

• Balmer

• Paschen

• Brackett

Tags

NGSS.HS-PS4-3

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

Tags

NGSS.HS-PS4-3

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