The energy difference between the first two levels of hydrogen atom is – McqOptions

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1.	The energy difference between the first two levels of hydrogen atom is 10.2 eV for another element of atomic number 10 and mass number 20, this will be
A.	2040 eV
B.	0.201 eV
C.	510 eV
D.	1020 eV
Answer» E.

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