Chemistry - Mole Concept Question with Solution | TestHub

ChemistryMole ConceptAtomic mass/Average Atomic Mass/Average Molecular MassEasy2 minPYQ_2024

ChemistryEasysingle choice

Which from following pairs is an example of isotones?

Options:

Answer:

Solution:

Isotones are atoms of different elements having the same number of neutrons.

Number of neutrons = Mass number ( $A$ ) - Atomic number ( $Z$ ).

For $_{6}^{12} C$ , number of neutrons = $12 - 6 = 6$ .

For $_{5}^{11} B$ , number of neutrons = $11 - 5 = 6$ .

Since both have $6$ neutrons, they are isotones.

Answer: $_{6}^{12} C;_{5}^{11} B$

Stream:MHT_CETSubject:ChemistryTopic:Mole ConceptSubtopic:Atomic mass/Average Atomic Mass/Average Molecular Mass

⏱ 2mℹ️ Source: PYQ_2024

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