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Which of the following electron transition in a hydrogen atom will require the largest amount of:
(1) From n-1 to n=2
(2) From n= 2 to n=3
(3) From n= ∞ to n=1
(4) From n=3 to n= 5
Ans: From n-1 to n=2
Which of the following represents the electronic configuration of an element with atomic number 17: (1) 1s 2, 2s 2 , 2p 6 , 3s 1, 3p 6 (2) 1s 2 , 2s 2 , 2p
CHOCH2CH(OH)CH2COOH
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