Answer:
kr means krypton
krypton atomic number is 36
electronic configuration: 1S² 2S² 2P⁶ 3S² 3P⁶3d¹⁰ 4S² 4P⁶
Step-by-step explanation:
in other forms:
[Ar] 3d¹⁰ 4S²4P⁶
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