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BÀI TẬP TRẮC NGHIỆM HÓA ĐẠI CƯƠNG VÀ VÔ CƠ CẨM NANG DÙNG LUYỆN THI THPTQG CHẤT LƯỢNG CAO (COLOR BOOK)

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VD6:<br />

Mg (Z = 12), Cl (Z = 17), Fe (Z = 26).<br />

Chú ý<br />

s, p.<br />

d, f.<br />

– Mg (Z = 12): 1s 2 2s 2 2p 6 3s 2<br />

– Cl (Z = 17): 1s 2 2s 2 2p 6 3s 2 3p 5<br />

– Fe (Z = 26): 1s 2 2s 2 2p 6 3s 2 3p 6 3d 6 4s 2<br />

(A) chu kì 3, nhóm VA.<br />

(C) chu kì 2, nhóm VIIA.<br />

(B) chu kì 3, nhóm VIIA.<br />

(D) chu kì 2, nhóm VA.<br />

– X (Z = 17): 1s 2 2s 2 2p 6 3s 2 3p 5<br />

2Z N 52 Z 17<br />

N Z 1 N 18<br />

VD8: Cation M + 6<br />

(A) chu kì 3, nhóm IIIA.<br />

(C) chu kì 3, nhóm IIA.<br />

(B) chu kì 2, nhóm VIIA.<br />

(D) chu kì 3, nhóm IA.<br />

+<br />

: 1s 2 2s 2 2p 6 M: 1s 2 2s 2 2p 6 3s 1<br />

4<br />

30

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