Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#X-Rays191Choose the best answerK-series X-rays are mainly produced by elements with:ASmall atomic numbersBLarge atomic numbersCNo neutronsDIdentical atomic masses Like 1 Discuss 0Share
Stoichiometry#Atomic Structure#Isotopes192Choose the best answerWhy is the relative atomic mass of chlorine about 35.45 instead of exactly 35 or 37?AChlorine atoms lose mass during bondingBChlorine contains equal numbers of neutrons and protonsCChlorine exists naturally as isotopes with different abundancesDAtomic masses are always decimal values Like 0 Discuss 0Share
Atomic StructureIsoelectronic Species193Choose the best answerWhich pair is isoelectronic?ACO₂ and NO₂BNO₂⁻ and CO₂CCN⁻ and CODSO₂ and CO₂ Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Atomic Structure#Subatomic Particles194Choose the best answerAn atom has atomic number 35 and mass number 80. Which option gives its correct composition?A35 protons, 35 electrons, 45 neutronsB35 protons, 35 electrons, 80 neutronsC35 protons, 36 electrons, 45 neutronsD35 protons, 36 electrons, 80 neutrons Like 0 Discuss 0Share
Atomic StructureProtons and Electrons in Ions195Choose the best answerThe nitride ion, N³⁻, contains:A7 protons and 10 electronsB10 protons and 10 electronsC7 protons and 7 electronsD10 protons and 7 electrons Like 0 Discuss 0Share