Chemistry - Atomic Structure Question with Solution | TestHub
ChemistryAtomic StructureDiscovery of Fundamental ParticlesHard2 minQB
ChemistryHardsingle choice
It is known that an atom contains protons, neutrons and almost massless electrons. If the mass of a proton is assumed to be three times its original value and that of a neutron one-third of its original value, then the atomic mass of will be:
Options:
Answer:
C
Solution:
has 17 protons and 18 neutrons. Take the original mass of each as 1 u: original mass = 35 u.
New mass = u.
Change = (57 - 35)/35 = 62.86 % more.
Traps: 45.7 % more ignores the neutron mass (51 u); 38.6 % less is 35 compared with 57.
Answer: (C).
Stream:JEESubject:ChemistryTopic:Atomic StructureSubtopic:Discovery of Fundamental Particles
⏱ 2mℹ️ Source: QB
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