Question

part d
indicate the number of unpaired electrons in kr.
express your answer as an integer.
unpaired electron(s)
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Explanation:

Step1: Determine Kr's electron configuration

Krypton (Kr) has an atomic number of 36. Its electron configuration is $1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10} 4p^6$.

Step2: Analyze orbital filling

In a noble gas like Kr, all orbitals are completely filled. For example, the p - orbitals (in the valence shell and inner shells) have 6 electrons each (filled as per the Pauli exclusion principle and Hund's rule, but since it's a noble gas, all electrons are paired). The s - orbitals have 2 electrons (paired) and the d - orbital (in the 3d subshell) has 10 electrons (paired as well). So there are no unpaired electrons.

Answer:

0