SELECT * FROM question_mgmt as q WHERE id=2828 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=8 AND chapterId=127 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 12th physics Nuclei the three stable isotopes of neon 20ne10 21ne10

Question:

The three stable isotopes of neon: 20Ne10, 21Ne10 and 22Ne10 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.

Answer:

Atomic mass of 20Ne10, m1 = 19.99 u

Abundance of 20Ne10, η1 = 90.51%

Atomic mass of 21Ne10, m2 = 20.99 u

Abundance of 21Ne10, η2 = 0.27%

Atomic mass of 22Ne10, m3 = 21.99 u

Abundance of 22Ne10, η3 = 9.22%

The average atomic mass of neon is given as:


SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='3' AND subId='8' AND ex_no!=0 AND status=1 and id!=2828 ORDER BY views desc, last_viewed_on desc limit 0,10
SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='3' AND subId='8' AND ex_no!=0 AND status=1 and id!=2828 ORDER BY last_viewed_on desc limit 0,10

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  • 4 months ago

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