Home
Class 12
PHYSICS
The three stable isotopes of neon .10Ne^...

The three stable isotopes of neon `._10Ne^(20), ._10Ne^(21)` and `._10Ne^(22)` have respective abundances of `90.51%,0.27%` and `9.22%`. The atomic masses of the three isotopes are `19.99u, 20.99u` and `21.99u` respectively. Obtain the average atomic mass of neon.

A

11.18 y

B

15.18 u

C

20.18 u

D

10.18 u

Text Solution

Verified by Experts

The correct Answer is:
C
The masses of three isotopes are 19.99 u, 20.99 u, 21.99 u
Their relative absundances are `90.51%, 0.27% and 9.22%`
`therefore" Average atomic mass of neon is "`
`m=(90.51xx19.99+0.27xx20.99+9.22xx21.99)/((90.51+0.27+9.22))`
`=(1809.29+5.67+202.75)/(100)=(2017.7)/(100)=20.18u`
Promotional Banner

Topper's Solved these Questions

  • ATOMS AND NUCLEI

    MTG GUIDE|Exercise NEET CAFÉ (TOPICWISE PRACTICE QUESTIONS)(MASS - ENERGY RELATION, MASS DEFECT AND NUCLEAR BINDING ENERGY)|8 Videos

  • ATOMS AND NUCLEI

    MTG GUIDE|Exercise NEET CAFÉ (TOPICWISE PRACTICE QUESTIONS)(NUCLEAR FORCE)|2 Videos

  • ATOMS AND NUCLEI

    MTG GUIDE|Exercise NEET CAFÉ (TOPICWISE PRACTICE QUESTIONS)(COMPOSITION AND SIZE OF NUCLEUS)|5 Videos

  • CURRENT ELECTRICITY

    MTG GUIDE|Exercise MCQs AIPMT / NEET|32 Videos

Similar Questions

Explore conceptually related problems

The three stable isotopes of neon Ne^20, Ne^21 and Ne^22 have respective abundances of 90.51% , 0.27 % and 9.22% . The atomic masses of the three isotopes are 19.99 u, 20.99 u and 21.99 u respectively. Obtain the average atomic mass of neon

the three stable isotopes of 9.051% , 0.27% and 9.22% the atomic masses of the three isotopes are 19.99 u , 20 .99 u and 21.99u respectively the average atomic mass of neon will be

Chlorine has two isotopes of atomic mass units 34.97 u and 36.97 u . The relative abundances of these two isotopes are 0.735 and 0.245 respectively. Find out the average atomic mass of chlorine.

Amongst the three isotopes of Neon - ._(10)^(20)Ne,._(10)^(21 )Ne and _(10)^(22)Ne the nucleus with the lowest n/p ratio is

Two stable isotopes of lithium ._3^6Li and ._3^7Li have respective abundances of 7.5% and 92.5% . These isotopes have masses 6.0152 u and 7.016004 u respectively. Find the atomic weight of lithium

Natural uranium is a mixture of three isotopes _92^234U , _92^234U , _92^235U and _92^238U with mass percentage 0.01%, 0.71% and 99.28% respectively. The half-life of three isotopes are 2.5xx10^5yr , 7.1xx10^8yr and 4.5xx10^9yr respectively. Determine the share of radioactivity of each isotope into the total activity of the natural uranium.