How many valence electrons does krypton have?

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Solution

The correct option is C 8
Krypton has atomic number 36 and electron configuration.

$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{10} 4 s^{2} 4 p^{6}$

The valence shell of krypton is 4th, hence, there are 8 electrons in this valence shell.

Hence, the correct option is C.

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