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MrRa [10]
4 years ago
15

A radioactive nuclide that is used for geological dating has an atomic number of 19 and mass number 40. Which is the symbol of t

his nuclide?

Chemistry
2 answers:
Alina [70]4 years ago
7 0
The mass number goes on top, and the atomic number goes on bottom. 
Therefore, the answer is C:
40
     K
19

aleksklad [387]4 years ago
3 0

Answer:

C. 40/19 K

Explanation:

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