Per NCERT, which of the following is the correct mass of the electron derived from Millikan's e and Thomson's e/m_e?
A1.6726 × 10⁻²⁷ kg
B1.6749 × 10⁻²⁷ kg
C6.022 × 10²³ kg
D9.1094 × 10⁻³¹ kg
Answer & Solution
Correct answer: D. 9.1094 × 10⁻³¹ kg
Per NCERT eqn 2.2, m_e = e ÷ (e/m_e) = 1.602 × 10⁻¹⁹ ÷ 1.7588 × 10¹¹ = 9.1094 × 10⁻³¹ kg. Others are m_p, m_n, N_A.
Related questions
The electronic configuration of nitrogen ($Z = 7$) in the ground state is:The shape of a p-orbital is best described as:A 3p orbital is specified by:The energy of the electron in the $n = 2$ orbit of hydrogen by Bohr's model is:Per NCERT Problem 2.2, a species with 18 electrons, 16 protons, and 16 neutrons has what sPer NCERT, isotopes of hydrogen include protium (¹H), deuterium (²H), and tritium (³H). WhPer NCERT, which pair of nuclides represents ISOBARS (same A, different Z)?Per NCERT Problem 2.1, in ⁸⁰₃₅Br how many neutrons, protons and electrons are present (ass