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CHUYÊN ĐỀ: Biên son   gi ng d y: Th  ầy Ngô Xuân Quỳ nh   ĐT: 0979.817.885 –  E_mail: [email protected] - http://www.hoahoc.org CU TO NGUYÊN T - BNG TUN HOÀN CÁC NGUYÊN T HÓA HC Câu 1 (ĐH - KB   2011) Cu hình electron ca ion Cu 2+  và Cr 3+  ln lượ t là A. [Ar]3d 9  và [Ar]3d 3 . B. [Ar]3d 9  và [Ar]3d 1 4s 2 . C. [Ar]3d 7 4s 2  và [Ar]3d 1 4s 2  . D. [Ar]3d 7 4s 2  và [Ar]3d 3 . Câu 2 (ĐH - KB   2011) Trong t nhiên Clo có hai đồng v bn: Cl 37 17 chiếm 24,23% t ng s nguyên t , còn li là Cl 35 17 . Thành phn % theo khi lượ ng ca Cl 37 17  trong HClO 4  A. 8,43%. B. 8,79%. C. 8,92%. D. 8,56%. Câu 3 (ĐH - CĐ   KA   2007) Trong t nhiên, nguyên t  đồng có hai đồng v Cu 63 29  Cu 65 29 . Nguyên t khi trung bình ca đồng là 63,54. Thành ph n phn trăm tng s nguyên t  ca đồng v Cu 63 29  A. 27%. B. 50%. C. 54%. D. 73%. Câu 4.  Nguyên t  c a nguyên t X có t ng s  h t electron trong các phân l ớ  p p là 7. S h t mang đin c a mt nguyên t  Y nhiu hơn s  h t mang đin c a mt nguyên t  X là 8 ht. Các nguyên t  X và Y ln lượ t là (biết s hiu nguyên t  ca nguyên t  : Na = 11; Al = 13; P = 15; Cl = 17; Fe = 26) A. Al và Cl B. Al và P C. Na và Cl D. Fe và Cl Câu 5 (ĐH - KA   2012) Nguyên t  R t o đượ c cation R + . Cu hình electron ở  phân lớ  p ngoài cùng c a R + (ở  tr ng thái cơ bn) là 2p 6 . Tng s ht mang đin trong nguyên t  R là A. 10 B. 11 C. 22 D. 23 Câu 6 (ĐH - KA   2012) X Y là hai nguyên t  thuc cùng mt chu k , hai nhóm A liên ti ế  p. S proton ca nguyên t  Y nhiu hơn s proton ca nguyên t  X. Tng s ht proton trong nguyên t  X và Y là 33.  Nhn xét nào sau đây v X, Y là đúng? A. Đơn cht X là cht khí ở  điu kin thườ ng. B. Độ âm đin ca X ln hơn độ âm đin ca Y. C. Lớ  p ngoài cùng ca nguyên t  Y (ở  tr ng thái cơ bn) có 5 electron. D. Phân lớ  p ngoài cùng ca nguyên t  X (ở  tr ng thái cơ bn) có 4 electron Câu 7 (ĐH - KA   2007) Dãy gm các ion X + , Y -  và nguyên t  Z đều có cu hình electron 1s 2 2s 2 2p 6  là: A. K + , Cl - , Ar. B. Li + , F - , Ne. C. Na + , F - , Ne. D. Na + , Cl - , Ar. Câu 8 (ĐH - KB    2010) Mt ion M 3+  có t ng s  ht proton, nơtron, electron là 79, trong đó s ht mang đin nhiu hơn s ht không mang đin là 19. Cu hình electron ca nguyên t  M là A. [Ar]3d 5 4s 1 . B. [Ar]3d 6 4s 2 . C. [Ar]3d 6 4s 1 . D. [Ar]3d 3 4s 2 . Câu 9 (ĐH - KA   2010) Nhn định nào sau đây đúng khi nói v 3 nguyên t :  X 26 13 , Y 55 26 ,  Z 26 12 ? A. X và Z có cùng s  khi. B. X, Z là 2 đồ ng v ca cùng mt nguyên t  hoá hc. C. X, Y thuc cùng mt nguyên t  hoá hc. D. X và Y có cùng s  nơtron. Câu 10  Nguyên t  ca nguyên t  X có cu hình electron 1s 2 2s 2 2p 6 3s 2 3p 6 4s 1 , nguyên t  ca nguyên t  Y có cu hình electron 1s 2 2s 2 2p 5 . Liên k ết hoá hc gia nguyên t  X và nguyên t  Y thuc loi liên k ết A. kim loi. B. cng hoá tr . C. ion. D. cho nhn Câu 11 S proton và s nơtron có trong mt nguyên t  nhôm ( 27 13 Al ) ln lượ t là A. 13 và 13. B. 13 và 14. C. 12 và 14. D. 13 và 15. Câu 12 (CĐ- KA   2009) Mt nguyên t  ca nguyên t  X có t ng s ht proton, nơtron, electron là 52 và có s khi là 35. S hiu nguyên t  ca nguyên t X là A. 18. B. 23. C. 17. D. 15. Câu 13 (CĐ- KA   2009) Nguyên t  ca nguyên t  X có electron ở  mc năng lượ ng cao nht là 3p. Nguyên t ca nguyên t  Y cũng có electron ở  mc năng lượ ng 3p và có mt electron ở  lớ  p ngoài cùng. Nguyên t  X và Y có s electron hơn kém nhau là 2. Nguyên t X, Y ln lượ t là A. kim loi và kim loi. B. phi kim và kim lo i. C. kim loi và khí hi ếm. D. khí hiếm và kim loi Câu 14 (CĐ- KA   2007) Cho các nguyên t  M (Z = 11), X (Z = 17), Y (Z = 9) và R (Z = 19). Độ  âm đin ca các nguyên t tăng dn theo th t A. M < X < Y < R. B. R < M < X < Y. C. Y < M < X < R. D. M < X < R < Y

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