tư chọn 10 - 3

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ÔN TẬP. BÀI TẬP: TỈ KHỐI CHẤT KHÍ, MOL, NỒNG ĐỘ DUNG DỊCH.
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Hoạt động GV - HS Nội dung
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II. Phương pháp 
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Hoạt động GV - HS Nội dung
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3.Trong tổỷ nhión õọửng coù 2 õọửng
vở:
63
Cu chióỳm 73% sọỳ nguyón tổớ,
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Cu. Tờnh M
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Câu 1
a) A: 1s
2
2s
2
2p
6
3s
1

Số thứ tự : 11, Chu kì 3 (vì có 3 lớp e), Nhóm
IA (vì A là nguyên tố s và có 1e hóa trò).
B: 1s
2
2s
2
2p
6
3s

2
3p
5

Số thứ tự : 17, Chu kì : 3 (vì có 3 lớp e),
Nhóm VIIA (vì B là nguyên tố p và có 7e hóa
trò).
b) A là Natri có tính kim loại vì có 1e ngoài
cùng.
B là Clo có tính phi kim vì có 7e ngoài cùng.
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XÁC ĐỊNH TÊN NGUYÊN TỐ Ở HAI CHU KỲ LIÊN TIẾP
I. Mục đích, yêu cầu:
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 ]
ƠN TẬP: SỰ BIẾN ĐỔI TUẦN HỒN CẤU HÌNH ELECTRON
I. Mục đích, u cầu:
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;%&.=4E:(R"6"MNO=?b6b.3"n)5".=.NO.D:
.R
;%&)/,"G"7"./$
II. Phương pháp 
;<(.")=>
III. Tiến trình lên lớp 
• @A65$ 
• B"(5" 

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I. Lý thuyết
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I=?b6b.3:.3A
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** Tìm nhóm phụ của nguyên tố d:
C=u hình electron chung: (n – 1)d
a
ns
b
Từ cấu hình chung, ta xét. Nếu:
• a + b < 8 : số thứ tự nhóm phụ nguyên tố đó
là: a+b
Vd: Z
Mn
= 25: 1s
2
2s
2
2p
6
3s
2
3p
6

3d
5
4s
2
.
Thuộc chu kì 4, nhóm VII B.
• a + b > 10: STT nhóm phụ nguyên tố đó
a+b -10
Vd:
Zn
K
: 1s
2
2s
2
2p
6
3s
2
3p
6
3d
10
4s
2
.
Thuộc chu kì 4, nhóm II B.
• 8
≤
a + b

≤
10 : Thuộc nhóm phụ nhóm
VIII B.
Vd:
Fe
1]
: 1s
2
2s
2
2p
6
3s
2
3p
6
3d
6
4s
2
.
Thuộc chu kì 4, nhóm VIII B.
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II. Bài tập:
Câu1)IR"M.DNO:.R
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.
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TỪ CẤU HÌNH ELECTRON SUY RA VỊ TRÍ, TÍNH CHẤT VÀ NGƯỢC LẠI
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ÔN TẬP PHẦN LIÊN KẾT ION.
Mục đích, yêu cầu
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Phương pháp:
; <(.")=>
Tiến trình lên lớp

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Hoạt động GV - HS Nội dung
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1C"T2."
- Theo quy tắc bát tử thì các nguyên tử của các
nguyên tố có khuynh hướng liên kết với các
nguyên tử khác để đạt được cấu hình electron
bền vững của các khí hiếm với 8 electron (hoặc
2 đối với heli) ở lớp ngoài cùng.
;Liªn kÕt ion lµ liªn kÕt ®ưîc h×nh thµnh
do lùc hót tÜnh ®iÖn gi÷a c¸c ion mang
®iÖn tÝch tr¸i dÊu.
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h
O
2

h
1
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2
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Na
.
[ ]

1
h
1h
O

Na
+
+ O
2-
+ Na
+


2
[ ]
+
Na
+ O
2-


Na
2
O
Phửụng trỡnh trao ủoồi electron :
4Na + O

2
= 2 Na
2
O.

h
11
Mg
d
h
_
1



[ ]
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1
h
11
Mg

[ ]

1
h
1h
O

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2Mg + O
2


2MgO.
Coõng thửực electron :
[ ] [ ]
+
11
OMg
Coõng thửực caỏu taùo: Mg=O
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2+
O
2-
.
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Tự chọn: 7 Ngày soạn: 28/11/07
ÔN TẬP: HOÁ TRỊ VÀ SỐ OXI HOÁ
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