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Câu 3. Cho các hạt vi mô: O
2-

+
, Mg
2+
. D. Na
+
, Mg
2+
, O
2-
, F
-
, Na, Mg, Al.
Câu 4. Nguyên tử của nguyên tố X có cấu hình electron ở 2 phân lớp ngoài cùng là 3d
2
4s
2
. Vị trí trong bảng
tuần hoàn của X là:
A. chu kì 4, phân nhóm chính nhóm IV. B. chu kì 4, phân nhóm phụ nhóm IV.
C. chu kì 4, phân nhóm chính nhóm II. D. chu kì 4, phân nhóm phụ nhóm II.
Câu 5.$0NO 7/PD$%PDQRS"CTO=UV*WUUX.
4
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kh
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Cõu 8.$,/3;NO )%$*$*$b7i%lH";*Q7B=M=B="7Q
=5K7a<Q7B=b7%TOaNO ";[4S%$$7*#;*
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Cõu 9.aU7U+[
3
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Câu 12.@`<<"t
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Câu 18.=TW<TO7
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Câu 19.%$$J/v{[ 9:
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Câu 20.$NO )"";UT*GI3RD$%q7](!=77/BZ
\7%TO#8$R|$4-SUy,/,w5L7B7]Iq7=b'
51/RS5 ?50/RS5 5-/S5 @50-/-S5
Câu 21. $= ]DH ,/ DH3/$ 4/R/ sDH/ s

Câu 24.Kc (Q D$[&fUeL%aBI=]B7
4
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3
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Câu 25.$BC=%) 9U`(7]IDzDd
1
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F
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3
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5 ?5
3
5 5?
3
5 @5?
3
5
Câu 385a3U7U+)/,*
3
K.
R
/*W4U7U+?.
3
)%a(
7%TO"QI*U7U+ y,45ˆ=+I(*eTO
5(y/,2y3/445?5(y/,2y3/445
5(y/32y4/345@5(y/32y4/345
Câu 39.$a*$U7U+[X.
4
*7X.
4

3
c%7a7%TO]cJ
,
*

5
?5J
,
/72J
3
X.
4

4
/7X.
4

3
2J
4
.
4
5
5J
,
/7/52J
3
X.
4

4
/7X.
4

3

3
K.
R

4
5
Câu 42.$RU7U+/$NU7U+[a$B77
3k
/
PD
4k
/
k
/d
3k
5$="$8
//PD/7/n"$8 Z[%TO*WZRU7U+'
5//PD5 ?5/5 5//75@5//5
Câu 43.NO J)PD./PD
3
.
4
/PD
4
.
R
‡-/-*BC$PD.MBC$PD
3
.
4

4
/5
57./PD./5 @5X
R
X.
3
/7//PD.5
Câu 45.X7/R7CI"$8$=+"%A%Q Z[$$/%TOR
a$(I"$85[7C
5X.
4

3
 ?5uX.
4

3
5 57X.
4

3
5 @5dX.
4

3
5
Câu 46.X7X.
4
%TO]cJ*";v5@`";v*$CTW%TOU7U+u5$$a
J*$u]HJa e*$=";X.U7H]5ˆZQ= Z[(ZH$$5def

[(ZH$$7%TOU7U+v$%)%a^3,/,S5X)%a ef=7C

3
*
3
$U7U+vTG[
5,/4S*4/RS5 ?5,3/4S*1/RS5
5,3/4S*4/RS5 @51/RS*,/4S5
Câu 50.'
E
 9U7U+[$7K.
R
/$X*W%L&G/f(C 5@7U+
7%TOB7 Z[$%TO
3
.
4
5~7Ln*
5Š3$‡‹35 ?5Š5 5‹3$‡Š35 @5
≥
35
,
, 3 4 R  - 0 1  ,

,, ,3 ,4 ,R , ,- ,0 ,
1
, 3
$ Hpq73rH$$5$s, sRs
 @  ? @   ?   @ @ ? ? ? @  ? ? ?
3, 33 34 3R 3 3- 30 3