$_{18} A r^{40}$ and $_{19} K^{40}$ are a pair of:

isomers

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isobars

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isotopes

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isotones

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Solution

The correct option is B isobars
$A r^{40}$ and $K^{40}$ have same mass no. 40 but different atomic number, therefore, they are called isobars.

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Similar questions

_{18} {Ar}^{40}

_{19} K^{40}

_{19} K^{40}

_{19} K^{40}

_{19} K^{40}

1.3 \times 10^{9}

Write the electronic configuration of $_{19} K^{40}$ .

_{19} K^{40}

_{19} K^{40}

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