1. Choose correct answers (50 points in totai) the For electron in atoms, which

Question

1. Choose correct answers (50 points in totai) the For electron in atoms, which set of these quantum numbers is allowed? (a) n- 3, 3, me 1, ms 1/2 (c) n 2, e- o, me 1, m. +'s (d) n 2, E 1. me 1, m,- +1/2. (2) What are the quantum numbers for the 4d orbitals: me G) The maximum number of electrons to fully occupy a 3s orbital is The maximum number of electrons to fully occupy all 3p orbitals is The maximum number of electrons to fully occupy all 3d orbitals is (d) 2 (c) 6 (a) 14 What is the electron configuration of o atom in ground state? (a) 1s2 2s42P2 (b) 1s22p6 (5) Among the following atomic configurations, which one is not in its ground state but in an excited state? (a) 3Li, 1s? 2s1 (c) C, 1s2 2s2 2p3 (6) Which electron diagram represents the ground state of 2p orbitals of carbon? (c) 11. (b) (a) 1L px py px py pa px py pz px py pz orbitals (7) In H3CCH2CH2CH3 molecule, Catoms take (c sp hybrid (d) non-hybrid (b) sp hybrid (a) sp hybrid structure of the molecule. This gives rise to (b) trigonal planar (c) octahedral (d) tetrahedral (a) linear

Explanation / Answer

Question 1.

recall that

n = 1,2,3,4. ... only positiv eintegers,

l = n-1 always, so l = n is not possible,

ml = 0,+/-l up to l

ms= +/-1/2 only

so

ignore b, since ms = 0

ignore a, since l = n

ignore c, since ml > l

therefore

only d is correct

n = 2, and l = n-1 = 1, and ml = l

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