, to H a. 92.7 nm b. 122 nm c. 40.1 nm d. 398 nm e. 300 nm when an electron move
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Question
, to H a. 92.7 nm b. 122 nm c. 40.1 nm d. 398 nm e. 300 nm when an electron moves from one energy level to another energy level more 3. In Bohr's atomic theory, distant from the nucleus a. Energy is emitted b. Light is emitted c. Energy is absorbed d. No change in energy occurs e. None of these Which of the following statements about quantum theory is incorrect? The velocity and position of an electron cannot be determined simultaneousl Lower energy orbitals are filled with electrons before higher energy orbitals When filling orbitals of equal new orbital No two electrons can have the same four quantum numbers All of these are correct a. energy, two electrons will occupy the same orbital before filling a d. e. 5. Ifn= 3, how many orbitals are possible? a. b. 4 d. 16 e. 18 6. How many orbitals are possible when2contain? a. 5 b. 10 C. d. 2 c7 e. 14Explanation / Answer
3.C
electron enter in to from loer energy level to higher energy level energy id absorbed
4. C
in equal energy orbital first filling each orbital one electron after half filling pairing started
5.C
number of orbitals in any shell = n2
= 32 = 9
3s - 1
3p -3
3d-5 total 9 orbitals
15. E
number of electron = 2(2l+1)
= 2(2*3+1) = 14
16.C
oxygen has more lectron affinitydue to small size
17. phosphorous has three electrons in ground state half filled configuration
P = 15 1s22s22p63s23p3
18.chlorine has smallest size
19. sodium has lower ionisation potential due to large size
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