Atomic Structure Mock Tests

The number of radial nodes in a 3p orbital is:

Among Fe²⁺, Fe³⁺, Co³⁺ and Ni²⁺ ions, which has the maximum number of unpaired electrons?

The work function of cesium is 2.14 eV. The threshold wavelength for cesium is: (h = 6.626 × 10⁻³⁴ J·s, c = 3 × 10⁸ m/s, 1 eV = 1.6 × 10⁻¹⁹ J)

An electron and a photon both have a de Broglie wavelength of 2.0 Å. What is the ratio of the kinetic energy of the electron to the energy of the photon? (h = 6.626 × 10⁻³⁴ J·s, mₑ = 9.1 × 10⁻³¹ kg, c = 3 × 10⁸ m/s)

The de Broglie wavelength associated with an electron accelerated through a potential difference of 100 V is approximately: (h = 6.626 × 10⁻³⁴ J·s, mₑ = 9.1 × 10⁻³¹ kg, e = 1.6 × 10⁻¹⁹ C)

The energy of an electron in the nth orbit of a hydrogen atom is given by En = -13.6/n² eV. The energy required to transition an electron from n = 2 to n = 3 is:

Which of the following sets of quantum numbers is NOT possible?

The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 m/s is: (h = 6.626 × 10⁻³⁴ J·s)