Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Bohr Model286Choose the best answerWhat is the centrifugal-force expression for an electron moving in a circular orbit of radius r?Amv²/r²Bmv/rCmv²/rDm²v/r Like 0 Discuss 0Share
Atomic StructureIsotopes287Choose the best answerNuclei of isotopes differ in:ANumber of protonsBNumber of neutronsCNumber of protons and neutrons bothDNone of these Like 0 Discuss 0Share
Atomic StructureDiscovery of Neutron288Choose the best answerThe discovery of the neutron was relatively difficult because the neutron:AExists only outside the nucleusBIs highly unstable in every nucleusCHas no electric chargeDCannot move Like 0 Discuss 0Share
SINDH MDCAT 2019 CHEMISTRY#Atomic Structure#Canal Rays289Choose the best answerThe nature of positive rays depends on: (Sindh MDCAT 2019)AThe nature of the electrodeBThe nature of the discharge tubeCThe nature of the residual gasDThe shape of the electrode Like 0 Discuss 0Share
SINDH MDCAT 2019 CHEMISTRY#Atomic Structure#Quantum Numbers290Choose the best answerQuantum number values for 2p orbitals are: (Sindh MDCAT 2019)An=2, l=1Bn=2, l=2Cn=2, l=0Dn=1, l=0 Like 0 Discuss 0Share