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【2026版化学高考步步高大二轮专题复习题库广东专用版题型突破1原子核外电子排布规范解答及原因解释

  • 2026-03-27 13:18:19
【2026版化学高考步步高大二轮专题复习题库广东专用版题型突破1原子核外电子排布规范解答及原因解释

题型突破1 原子核外电子排布规范解答及原因解释

1.(2024·广东卷)酸在多种反应中具有广泛应用,其性能通常与酸的强度密切相关。

(1)酸催化下NaNO2与NH4Cl混合溶液的反应(反应a),可用于石油开采中油路解堵。

基态N原子价层电子的轨道表示式为。 

答案

解析 N的原子序数为7,位于第二周期第A族,基态N原子价层电子的轨道表示式为

2.(2023·广东卷)配合物广泛存在于自然界,且在生产和生活中都发挥着重要作用。

基态Fe2+的3d电子轨道表示式为。 

答案

解析基态Fe2+3d电子轨道表示式为

3.(2022·广东卷)Se与S同族,基态硒原子价电子排布式为。 

答案 4s24p4

解析基态S价电子排布式为3s23p4,SeS同族,Se为第四周期元素,因此基态Se价电子排布式为4s24p4

4.(2021·广东卷)很多含巯基(-SH)的有机化合物是重金属元素汞的解毒剂。

基态硫原子价电子排布式为。 

答案 3s23p4

解析硫为16号元素,基态硫原子的价电子排布式为3s23p4

5.(2024·新课标卷)Ni基态原子价电子的轨道表示式为。 

答案

解析 Ni28号元素,基态Ni原子的价电子排布式为3d84s2,价电子的轨道表示式为

6.(2024·全国甲卷)A族元素具有丰富的化学性质,其化合物有着广泛的应用。回答下列问题:

该族元素基态原子核外未成对电子数为,在与其他元素形成化合物时,呈现的最高化合价为。 

答案 2 +4

解析基态A族元素的价电子排布式为ns2np2,核外未成对电子数为2;在形成化合物时,呈现的最高化合价为+4

7.(2024·浙江1月选考)氮和氧是构建化合物的常见元素。

请回答:

下列说法正确的是。 

A.电负性:B>N>O

B.离子半径:P3-     <S< span>2-       <Cl< span>-        </Cl<>      </S<>

C.第一电离能:Ge     <Se<As< span>      </Se<As<>

D.基态Cr2+的简化电子排布式:[Ar]3d4

答案 CD

解析同一周期,从左到右,电负性依次增强,故顺序为O>N>B,A错误;核外电子排布相同,核电荷数越大,半径越小,故顺序为P3->S2->Cl-,B错误;同一周期,从左到右,电离能呈增大的趋势,第A族和第A族相反,故顺序为Ge     <Se<As,C< span>正确;基态Cr的简化电子排布式:[Ar]3d54s1,Cr2+的简化电子排布式为[Ar]3d4,D正确。      </Se<As,C<>

考情分析:物质结构与性质广东高考采用“分散”命题方式,各小题之间相对独立,其中原子结构与性质是必考内容。

考查角度:微粒电子排布式、电子排布图、价电子排布、电子数判断等。

1.原子核外电子排布的“三”规律

能量最

低原理

原子核外电子总是先占据能量最低的原子轨道

泡利原理

每个原子轨道上最多只能容纳2个自旋状态相反的电子

洪特规则

当电子排布在同一能级的不同轨道时,基态原子中的电子总是优先单独占据一个轨道,而且自旋状态相同

2.特殊基态原子的价电子排布

(1)7个主族和0族元素价电子排布

价电子排布式

A

ns1

A

ns2

A

ns2np1

A

ns2np2

A

ns2np3

A

ns2np4

A

ns2np5

0

ns2np6

(2)第四周期副族和第族元素价电子排布

元素名称

元素符号

价电子排布式

B

21Sc

3d14s2

B

22Ti

3d24s2

B

23V

3d34s2

B

24Cr

3d54s1

B

25Mn

3d54s2

B

26Fe

3d64s2

27Co

3d74s2

28Ni

3d84s2

B

29Cu

3d104s1

B

30Zn

3d104s2

3.CrCu原子的核外电子排布式

通过网盘分享的文件:word讲义【更新联系:lymsummers】等2个文件

链接: https://pan.baidu.com/s/1VcNxeHXgbJfoVMtA3SnQAg?pwd=4321 提取码: 4321 

--来自百度网盘超级会员v8的分享

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  1. CONNECT:[ UseTime:0.000652s ] mysql:host=127.0.0.1;port=3306;dbname=i_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001168s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000462s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000489s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001081s ]
  6. SELECT * FROM `set` [ RunTime:0.000411s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001232s ]
  8. SELECT * FROM `article` WHERE `id` = 462524 LIMIT 1 [ RunTime:0.002293s ]
  9. UPDATE `article` SET `lasttime` = 1774764428 WHERE `id` = 462524 [ RunTime:0.001217s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000549s ]
  11. SELECT * FROM `article` WHERE `id` < 462524 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001134s ]
  12. SELECT * FROM `article` WHERE `id` > 462524 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001026s ]
  13. SELECT * FROM `article` WHERE `id` < 462524 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.009442s ]
  14. SELECT * FROM `article` WHERE `id` < 462524 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004303s ]
  15. SELECT * FROM `article` WHERE `id` < 462524 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.006413s ]
0.155587s