Question

1. An element has the following electronic configuration: [Kr]4d5552 (a) What period does it belong to? (b) What is its group number? (Use group numbers from 1 to 18) (c) What kind of element is it? (Main group metal, transition metal, metalloid, nonmetal?) (d) How many unpaired electrons are there in an atom of this element? (a) What element has this electronic configuration? 1s 2s 2p 3s2 (b) What element has this electronic configuration? - - - - 3d 4p (a) Which of the following atoms or ions is diamagnetic? Cu2+ Se4+ V2+ CO3+ V4+ (b) Which of the following atoms or ions is paramagnetic? C13+ N3+ Mn7+ V5+ Ne Which one of the following elements has a +2 ion with 3 unpaired electrons ? Mg S Mn Se 5. Use periodic trends and predict which of the following elements has the smallest first ionization energy. N Ge Rb As

I need help with all these questions. Please and thank you

Answer 1

metels Inner pansition J al 11 al El 6 8 L G stoful. useisure Ei 14 9 Gl 4 81 periods Schomet

Mo - electronic configuration -Lkol 4d5552 @ Mo belongs to perfod 5 (6) It belongs to group 6 OB s pansition metal @ No of unpared elegans = 5 11. It || 1/1/1 45 54 → 5 uppelse electron @ @ Magneium electronic configuration - 1s5287 284,352 atomic NO 12 b # # # # cobalt atomic No 2 27 electante configuration - LAYT 453307 i7 Ly 27 copper atomic No - 29 electronic com Fry urcition - ID 3410451 cytz eo configuration - [AT] 329 450 # # # # t = 34 I un pafred elechon i.e.poramagnetic li> se4t Atomic No - 34 elecpinil configuration | Ay) 3d"2453 4p4 se 41 10813d10452 No cenpuired eo le dimagnetic # # # # # # 34

- 11171 +2 - atom! No 23 electonic configuration -TAXI 313 412 elechoni configuration - Cord 3d3 450 & # - gumpared elechon - puro magnetic atomic No - 23 e configuration Arl 3d3482 1 14 eo configuration & Ar 3d 482 † - - - 30 I unpaired eo - By pao magnetic & Cat3 otomic to - 27 ee configuration - Ar] 453 397 cot - pe configuration Harl 450, 306 7 & 7 + 7 30 4 un pored pe paromagnetic sh 25

37 b 013 af of NO - 11 elebonic conffgusation - INel 35305 CB electric configuration / Nel 352 312 in 2 uppaped ee paramagnetic atomic no - 7 elechonic configuration - 157,252, 213 N13 eo configura rich - 152,252 Dimagnetic Mounpuired ee Moth atomic MO - 25 e econfigurosion - Ar 45,305 Mot7 eo anfyuration - Ar 300 Mo para magnetic = 15 atomic No - 23 o configuration last 383 452 1f5 es configuration - Arl 3d No para magnetic

re atonic No - 102 1041 electonic configuration - He/283, 286 Ho un paired eo dimagnetice - okols

4 My - atomic Ho - 12 e configumshion - Hel 38 s- atomic ro - 16 an eo configunition - He/ 352, 314 Mn- atomic No - 25 е ecophyumph (hy) 41?зд? se - atomje No - 34 eo configuration - Arl 32° 45², 414 V atory (No - 23 ee configuration - Lar / 45²303 "V have +2 ion with 3 unpurred eleefon IE 1400 780 400 go Ny As y Gey Rb