Electron Electron wave and particle properties, Pauli Exclusion Principle, de Broglie wavelength formula, threshold wavelength, Kinetic energy relates to speed 1 / 10 Which of the following best describes the dual nature of electrons? Wave nature only Particle nature only Neither wave nor particle nature Both wave and particle nature 2 / 10 The mass of an electron is approximately: 9.1 × 10^-19 g 9.1 × 10^-28 g 1.6 × 10^-19 g 1.6 × 10^-28 g 3 / 10 The energy of an electron in the n-th orbit of a hydrogen atom is proportional to: 1/n n n^2 1/n^2 4 / 10 The Pauli Exclusion Principle states that: Electrons in the same atom can have identical quantum numbers Electrons in different atoms cannot have identical quantum numbers Electrons in the same atom cannot have identical quantum numbers Electrons in the same molecule cannot have identical quantum numbers 5 / 10 An electron jumps from a higher to a lower energy level in an atom. What is emitted? A neutron An electron A photon A positron 6 / 10 What is the de Broglie wavelength of an electron accelerated through a potential difference of 150 V? 8.3 × 10^-10 m 1.0 × 10^-10 m 1.2 × 10^-10 m 1.5 × 10^-10 m 7 / 10 The work function of a metal is 4.0 eV. What is the threshold wavelength for photoemission? 415 nm 310 nm 620 nm 775 nm 8 / 10 What is the speed of an electron with kinetic energy of 1 keV? 1.88 × 10^7 m/s 1.75 × 10^8 m/s 8.7 × 10^7 m/s 5.93 × 10^7 m/s 9 / 10 The uncertainty in the position of an electron is (10^{-10} , ext{m}). What is the uncertainty in its momentum? 6.63 × 10^-24 kg·m/s 1.05 × 10^-34 kg·m/s 3.3 × 10^-24 kg·m/s 5.3 × 10^-24 kg·m/s 10 / 10 In the quantum mechanical model, the electron’s angular momentum in the second orbit of hydrogen is: 1.05 × 10^-34 J·s 2.1 × 10^-34 J·s 3.14 × 10^-34 J·s 6.28 × 10^-34 J·s Your score is By WordPress Quiz plugin
