Assertion : Average atomic mass of Boron is 10.3. Reason : Boron has two isotopes: B 10 and B 11 whose percentage abundances are 19.6% and 80.4% respectively.

Average atomic mass = 100 19.6 ( 10 ) + 80.4 ( 11 ) = 100 196 + 884.4 = 10.8

Chemistry - Atomic Structure Question with Solution | TestHub

ChemistryAtomic StructureBohr's Atomic ModelMedium2 minQB

ChemistryMediumassertion reason

Assertion : Average atomic mass of Boron is 10.3.

Reason : Boron has two isotopes: B¹⁰ and B¹¹ whose percentage abundances are 19.6% and 80.4% respectively.

Answer:

Solution:

Average atomic mass = $\frac{19.6 ( 10 ) + 80.4 ( 11 )}{100} = \frac{196 + 884.4}{100} = 10.8$

Stream:JEESubject:ChemistryTopic:Atomic StructureSubtopic:Bohr's Atomic Model

⏱ 2mℹ️ Source: QB

Loading discussions...