The radius of the first Bohr orbit of electrons in the hydrogen atom i – McqOptions

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1.	The radius of the first Bohr orbit of electrons in the hydrogen atom is 0.529 Å. What is the radius of the second Bohr orbit in singly ionized helium atom?
A.	1.058 Å
B.	0.264 Å
C.	10.58 Å
D.	0.0264 Å
Answer» B. 0.264 Å

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