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Physics Part-II

Nuclei

The three stable isotopes of neon: _{10}^{20}{Ne}, _{10}^{21}{

Physics Part-II

Class 12

NCERT

Chapter 1: Ray Optics and Optical Instruments

41 questions

Chapter 2: Wave Optics

30 questions

Chapter 3: Dual Nature of Radiation and Matter

44 questions

Chapter 4: Atoms

23 questions

Chapter 5: Nuclei

38 questions

(a) Two stable isotopes of lithium

_{3}^{6} Li

and

_{3}^{7} Li

have respective abundances of 7.5% and 92.5%. These isotopes have masses 6.01512 u and 7.01600 u, respectively. Find the atomic mass of lithium.

(b) Boron has two stable isotopes,

_{5}^{10} B

and

_{5}^{11} B

. Their respective masses are 10.01294 u and 11.00931 u, and the atomic mass of boron is 10.811 u. Find the abundances of

_{5}^{10} B

and

_{5}^{11} B

The three stable isotopes of neon:

_{10}^{20} Ne

_{10}^{21} Ne

and

_{10}^{22} Ne

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.

Obtain the binding energy (in MeV) of a nitrogen nucleus

(_{7}^{14} N)

[Given: m

(_{7}^{14} N)

=14.00307 u.]

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Chapter 6: Semiconductor Electronics: Materials, Devices and Simple Circuits

25 questions

Question

Easy

Solving time: 4 mins

The three stable isotopes of neon: $_{10}^{20} Ne$ , $_{10}^{21} Ne$ and $_{10}^{22} Ne$ 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.

Name: Video solution 1: [Solved] The three stable isotopes of neon: 1020Ne, 1021Ne and 1022Ne 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. - Physics Part-II
Uploaded: 2022-10-18T16:48:31.000Z
Duration: 5 min
Description: Video solution 1: [Solved] The three stable isotopes of neon: 1020Ne, 1021Ne and 1022Ne 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. - Physics Part-II

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Updated on: Oct 18, 2022

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Physics Part-II (NCERT)

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The three stable isotopes of neon:

_{10}^{20} Ne

_{10}^{21} Ne

and

_{10}^{22} Ne

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.

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Text solutionVerified

The atomic mass is given by,

Average atomic mass

= \sum_{i = 1}^{n} (ma s s_{(i)}) (A b u n d an c e_{(i)})

m = \frac{90.51 \times 19.99 + 0.27 \times 20.99 + 9.22 \times 21.99}{100}

= 20.18 u

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Practice more questions from Physics Part-II (NCERT)

(a) Two stable isotopes of lithium

_{3}^{6} Li

and

_{3}^{7} Li

have respective abundances of 7.5% and 92.5%. These isotopes have masses 6.01512 u and 7.01600 u, respectively. Find the atomic mass of lithium.

(b) Boron has two stable isotopes,

_{5}^{10} B

and

_{5}^{11} B

. Their respective masses are 10.01294 u and 11.00931 u, and the atomic mass of boron is 10.811 u. Find the abundances of

_{5}^{10} B

and

_{5}^{11} B

The three stable isotopes of neon:

_{10}^{20} Ne

_{10}^{21} Ne

and

_{10}^{22} Ne

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.

Obtain the binding energy (in MeV) of a nitrogen nucleus

(_{7}^{14} N)

[Given: m

(_{7}^{14} N)

=14.00307 u.]

View all

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Question Text	The three stable isotopes of neon: $_{10}^{20} Ne$ , $_{10}^{21} Ne$ and $_{10}^{22} Ne$ 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.
Updated On	Oct 18, 2022
Topic	Nuclei
Subject	Physics
Class	Class 12
Answer Type	Text solution:1 Video solution: 2
Upvotes	241
Avg. Video Duration	5 min

The three stable isotopes of neon: $_{10}^{20} Ne$ , $_{10}^{21} Ne$ and $_{10}^{22} Ne$ 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.

Text solutionVerified

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The three stable isotopes of neon: 1020​Ne, 1021​Ne and 1022​Ne 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.

Text solutionVerified

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The three stable isotopes of neon: $_{10}^{20} Ne$ , $_{10}^{21} Ne$ and $_{10}^{22} Ne$ 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.