The energy of 1st orbit in a hydrogen atom __________

1.	The energy of 1^st orbit in a hydrogen atom __________
A.	3.18 10<sup> 12</sup> J
B.	2.18 10<sup> 18</sup> J
C.	3.18 10<sup> 18</sup> J
D.	2.18 10<sup> 18</sup> J
Answer» C. 3.18 10<sup> 18</sup> J

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