Question : Which element of group 13 has the atomic number 113, and its electronic configuration is [Rn] 5f14 6d107s2 7p1?
Option 1: Gallium
Option 2: Indium
Option 3: Nihonium
Option 4: Thallium
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Correct Answer: Nihonium
Solution : The correct answer is Nihonium.
The shell structure of Nihonium atoms is 2.8.18.32.32.18.3, and they contain 113 electrons. Neutral Nihonium has the electrical configuration [Rn] in its ground state.
Nihonium's term symbol is 2P1/2, and its electronic structure is estimated to be [Rn] 5f 14 6d 10 7s 2 7p 1 (based on that of thallium).
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