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  4. Which has the highest e/m ratio?

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Q. Which has the highest $ e/m $ ratio?

ManipalManipal 2010Structure of Atom

Solution:

$e / m$ ratio for $H e^{2+}=\frac{2}{4}$
$e / m$ ratio for $H^{+}=\frac{1}{1}$
$e / m$ ratio for $H e^{+}=\frac{1}{4}$
$e / m$ ratio for $D^{+}=\frac{1}{2}$
$\therefore $ The $e / m$ is highest for hydrogen.