The IUPAC symbol for the element with atomic number 199 would be

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unh

uue

uun

une

answer is B.

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Detailed Solution

So, symbol of the element - uue
Name of the element - Ununennium
It is expected to be s-block element an alkali metal and the first
element in eighth period. It is the lightest element that has not yet been synthesised.

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