Stoichiometry#Atomic Structure#Isotopes401Choose the best answerWhat is a mass spectrometer mainly used to determine?AAn instrument used to determine the chemical formula of compoundsBAn instrument used to separate atoms according to their colourCAn analytical instrument used to determine the relative isotopic masses and relative abundances of isotopesDAn instrument used to measure the density of elements Like 0 Discuss 0Share
SINDH MDCAT 2019 CHEMISTRY#Atomic Structure#Subatomic Particles402Choose the best answerThe mass of an electron is: (Sindh MDCAT 2019)A1.008 amuB1.009 amuC0.000550 amuD0.5500 amu Like 0 Discuss 0Share
Stoichiometry#Atomic Structure#Isotopes403Choose the best answerWhich isotope-count pairing is incorrect?ATin – 10BCadmium – 6CPalladium – 6DNickel – 5 Like 0 Discuss 0Share
BasicsStoichiometry #Atomic Structure#Isotopes404Choose the best answerAn element X has isotopes ¹²⁵X, ¹²⁶X and ¹³¹X. How do these isotopes differ?AThe isotopes have different numbers of protonsBThe isotopes have different numbers of neutronsCThe isotopes have more electrons and protonsDThe isotopes have the same number of protons and neutrons Like 0 Discuss 0Share
Stoichiometry#Atomic Structure#Isotopes405Choose the best answerWhich technique is used to determine relative isotopic abundance?AX-ray diffractionBMass spectrometryCFlame testDChromatography Like 0 Discuss 0Share