CBSE Class 11 c11atomdiscovery — practice questions
16 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 11 c11atomdiscovery in the app →Per NCERT, the charge-to-mass ratio e/m_e of the electron, measured by J.J. Thomson in 1897, is which value?Per NCERT, which experiment determined the charge on the electron as −1.602 × 10⁻¹⁹ C?Per NCERT, which of the following is the correct mass of the electron derived from Millikan's e and Thomson's Per NCERT, key observation from cathode-ray experiments was that the characteristics of cathode rays did NOT dPer NCERT, who discovered the NEUTRON, by what experiment, and in what year?Per NCERT Table 2.1, which fundamental particle has approximate mass 1.674927 × 10⁻²⁷ kg and zero charge?Per NCERT, the smallest and lightest positive ion (a proton) was obtained from which gas in modified cathode-rPer NCERT eqn 2.3 + 2.4, for a neutral atom what relations hold between atomic number Z, mass number A, and coPer NCERT Problem 2.1, in ⁸⁰₃₅Br how many neutrons, protons and electrons are present (assuming neutral atom)?Per NCERT, which pair of nuclides represents ISOBARS (same A, different Z)?Per NCERT, isotopes of hydrogen include protium (¹H), deuterium (²H), and tritium (³H). What distinguishes thePer NCERT Problem 2.2, a species with 18 electrons, 16 protons, and 16 neutrons has what symbol?The energy of the electron in the $n = 2$ orbit of hydrogen by Bohr's model is:A 3p orbital is specified by:The shape of a p-orbital is best described as:The electronic configuration of nitrogen ($Z = 7$) in the ground state is: