1f:["$","div",null,{"className":"px-6 pb-6","children":[false,["$","div",null,{"className":"text-foreground leading-relaxed mb-6","children":["$","div",null,{"className":"question-html prose dark:prose-invert max-w-none","dangerouslySetInnerHTML":{"__html":"

How many of the following are lanthanides?
Uranium, praseodymium, erbium, gadolinium, curium, hafnium, osmium, iridium

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Praseodymium $(Pr),$ erbium $(Er)$ and gadolinium $(Gd)$ are lanthanoids.

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Chemistry - f-block Question with Solution | TestHub

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