1 Chú ý nhân chu kì 21 Ô nguyên Chu kì Nhóm VD1: Na (Z = 11): [Ne] 3s1; Ca (Z = 20): [Ar]4s2 31 VD2: Fe có Z = 26 VD3: Fe (Z = 26): 1s22s22p63s23p63d64s2 Na (Z = 11): 1s22s22p63s1 anpb VD4: Na (Z = 11): [Ne]3s1 Al (Z = 13): [Ne]3s23p1 ansb a+b 3–7 – 10 11, 12 VD5: Cr (Z = 24): [Ar]3d54s1 Nhóm IIIB – VIIB VIIIB IB IIB Fe (Z = 26): [Ar]3d64s2 Cu (Z = 29): [Ar]3d104s1 không (A (B (C (D (A (B (C (D (A) (B) (C) (D) 16 (A (B (C (D (A (B không (C (D (A) (B) (C) (D) (A) (B) (C) (D) (A) IIIA (B) VIB (C) VA (D) VIA (A) IIA 34s2 (B) VA (C) VB (D) IIIB VD6: Mg (Z = 12), Cl (Z = 17), Fe (Z = 26) Chú ý – Mg (Z = 12): 1s22s22p63s2 s, p – Cl (Z = 17): 1s22s22p63s23p5 d, f – Fe (Z = 26): 1s22s22p63s23p63d64s2 (A) chu kì 3, nhóm VA (C) chu kì 2, nhóm VIIA (B) chu kì 3, nhóm VIIA (D) chu kì 2, nhóm VA 2Z N 52 N Z Z 17 N 18 – X (Z = 17): 1s22s22p63s23p5 VD8: Cation M+ (A) chu kì 3, nhóm IIIA (C) chu kì 3, nhóm IIA (B) chu kì 2, nhóm VIIA (D) chu kì 3, nhóm IA +: 1s22s22p6 M: 1s22s22p63s1 A (A (C (B (D B 22s22p2 (A (C (B (D C (A (C (B (D D 23p5 (A (C (B (D E 14s2 (A (C (B (D F 74s2 (A (C (B (D G (A) IIA (B) IIB (C) VIB (D) VIIIB H (A (C (B (D I (A (C J (B (D Anion X- cation Y2+ 3s23p6 A) B) C) D) K Ion M2+ (A) chu kì 4, nhóm VIIIB (C) chu kì 4, nhóm VIIIA L (A) chu kì 3, nhóm IIIA (C) chu kì 3, nhóm VIA (B) chu kì 4, nhóm VIB (D) chu kì IV, nhóm IIA 3+ (B) chu kì 4, nhóm IA (D) chu kì 3, nhóm IIA VD9: 1s22s22p63s2 VD10: N 1,52Z 3Z 28 3,52Z 7,95 Z 9,33 22s22p4 22s22p5 1s22s22p5 Z=9 M (A) [Ne]3s2 (B) [Ar]3s2 (C) [Ar]4s2 (D) [Ar]4p2 N (A) [Ar]3d6 (B) [Ar]3d44s2 (C) [Ar]3d54s1 (D) [Ar]3d64s2 O (A) (B) (C) (D) P (A) [Ne]3s1 (B) [Ne]3s23p2 (C) [Ne]3s2 (D) [Ne]3s23p1 Câu D Câu E C C F D B G D B H B C I D B J C B K A C L A C M C A D N C B C O B C B P D D C