Question

23. Which of the following sets of quantum numbers is not allowed (invalid)? d. n=2, L = 1, m L = 1, ms =-1/2 24. How many of the following elements have 1 unpaired electron in the ground state? Al CI d. 4 25. Which of the following electron configurations is not possible? a. 1 b. 2 c. 3 a. 1s22s22p5 b. 1s22s22p3 c. 1s22s22p2 d. 1s22s1 e. 1s22s32p 26. Which of the following properties, in general, decrease as we move down a group in the periodic table? 1. lonization energy 2. Atomic radius 3. Electronegativity a. 1 only b. 2 only c 3 only d. 2 and 3 only e. 1 and 3 only 27. How many lone pairs of electrons exist in the Lewis bond structure of sO32? a. 12 b. 10 c 8 d. 7 e. 6 28. What is the formal charge on the carbon atom in COs2-? a. +2 b. +1 CO d-1 e. -2

Answer 1

3 Alouve d combinaionsa auanctum numb ens ane at ven by Principam mumbt i zimuth al quanhm umben Zin Jeo, 1 , 2., me

Spin gut q ntum number (s) From all above conditon f we see il not poRA, ble mumb eng are not valid So, sthe coect optionwill b e

ElectnonicConfigunation e i iven Mere algo , mumb en unpaired electaong Зрч Se, mumben unpaired electrons 2

Se, numb eun paired eledong the one unpaired elechrong 8, AL, Ce So, tha correct option will be 3 Hence, numb eaf elements tohich ome having

S- onbitals contain and p-oabi emerim 6 electaong Electronic (onfiguradion age)부 given by In this Case oabital Contain el echerg whichi not possible Se, Thi eleconfiasunedionnot pasible So the (oarect option wi

u ro do uun en en and elect飞Dnea atl V1 decheageg. Se the corr ection option wlbe ©1 and 3 only. That ǐ8工onization enenga and Electron egativit .

molecalesSO = 8 lone pang electron Then tha (corect option wll be C) 8. 2heom a change on the cavibon atom CO ivenby

Fon mal change on canuon valence electrons Non Gonding elechaons- Bonding elechons Fon mal change on th cabonin CO3 So, the cory ect optonwielbe C) o.