6. The difference in energy between the n=1 and the n=2 energy levels of a hydrogen atom is 1.64 x 10-18 J. What happens
when an electron transitions from n =2 to n =1?
a
Exactly 1.64 x 10-18 J of energy is
released.
b Exactly 1.64 x 10-18 J of energy is
absorbed.
с
An amount of energy equal to or greater
than 1.64 x 10-18 J is released.
d
An amount of energy equal to or greater
than 1.64 x 10-18 J is absorbed.

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the answer is a and have a great day

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8