Radius of a given Bohr orbit of hydrogen or a hydrogen-like ion (He+, Li2+, Be3+, B4+)

The same question, asked 7 times: 4 May 2023 S2*, 10 May 2023 S1*, 15 May 2023 S1*, 15 May 2023 S2*, 10 May 2024 S2*, 12 May 2024 S2*, 14 May 2024 S1. Every wording below, oldest first.

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Question 1
4 May 2023 S2
58 $Calculate radius of fourth orbit of B⁴⁺ ion.$
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Question 2
10 May 2023 S1
74 $\text{He}^+$
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Question 3
15 May 2023 S1
71 $\text{Li}^{2+}$
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Question 4
15 May 2023 S2
60 $\text{He}^+$
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Question 5
10 May 2024 S2
84 $^{+++}$
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Question 6
12 May 2024 S2
99 $What is the radius of fourth orbit of hydrogen atom?$
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Question 7
14 May 2024 S1
93 $\text{He}^+$
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Radius of a given Bohr orbit of hydrogen or a hydrogen-like ion (He+, Li2+, Be3+, B4+)

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