atomic structure and chemical bond

Which of the following statements about quantum numbers is incorrect?

• The azimuthal quantum number determines the shape of the orbital

• The magnetic quantum number specifies the orientation of the orbital

• The spin quantum number can have fractional values

• The principal quantum number determines the energy of the electron

Which isotope of hydrogen has the highest binding energy per nucleon?

• Protium

• Deuterium

• Tritium

• All have the same

What is the energy of an electron in the third Bohr orbit of a hydrogen atom?

• -1.51 eV

• -3.4 eV

• -13.6 eV

• -0.85 eV

Which experiment confirmed the presence of quantized energy levels in atoms?

• Rutherford’s gold foil experiment

• Franck-Hertz experiment

• Oil drop experiment

• Cathode ray tube experiment

What is the de Broglie wavelength of an electron moving with a velocity of 5 × 10^6 m/s? (Mass of electron = 9.1 × 10−31 kg, Planck’s constant = 6.63 × 10−34 Js)

• 0.146 nm

• 0.145 nm

• 0.140 nm

• 0.150 nm

Which quantum number is responsible for the number of orbitals in a subshell?

• Principal quantum number

• Azimuthal quantum number

• Magnetic quantum number

• Spin quantum number

Which of the following orbitals does not exist?

• 1p

• 2d

• 3f

• 4f

The uncertainty principle was given by:

• Bohr

• Heisenberg

• Schrodinger

• Planck

The wave function ψ represents:

• Position of electron

• Energy of electron

• Probability amplitude

• Speed of electron

Which quantum number is responsible for the energy of an orbital in a hydrogen atom?

• Principal quantum number

• Azimuthal quantum number

• Magnetic quantum number

• Spin quantum number