If the sum of atomic mass of 3 elements forming Dobereiner traid is 69, then atomic mass of second element

If the sum of atomic mass of 3 elements forming Dobereiner traid is 69, then atomic mass of second element
A. 7
B. 46
C. 39
D. 23

Monjur Alahi

6 views

2025-01-04 04:42

1 Answers

Salim Ahmed Kawsar

Correct Answer - D
`{:(Li,,Na,,K),(7,+,23,+,39=69):}`
`(7+39)/(2)=23`

6 views Answered 2023-02-05 15:29

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