a radioactive nuclide that is used for geological dating has an atomic number of 19 and mass number 40…
a radioactive nuclide that is used for geological dating has an atomic number of 19 and mass number 40. which is the symbol of this nuclide?\n$_{21}^{19}k$\n$_{19}^{21}k$\n$_{19}^{40}k$\n$_{40}^{19}k$
Answer
Brief Explanations:
The symbol of a nuclide is written as $Z^A X$, where $Z$ is the atomic number, $A$ is the mass - number, and $X$ is the chemical symbol. The element with atomic number 19 is potassium, symbol $K$. Given atomic number $Z = 19$ and mass number $A=40$, the nuclide symbol is ${19}^{40}K$.
Answer:
$_{19}^{40}K$ (corresponding to the third option in the multiple - choice list)