下列各离子的电子排布式哪个是18电子构型。( )
A: Fe[img=17x22]1803dd5f3592d86.png[/img]
B: Zn[img=17x22]1803dd5f3592d86.png[/img]
C: Ca[img=17x22]1803dd5f3592d86.png[/img]
D: S[img=17x22]1803dd5f5062b08.png[/img]
A: Fe[img=17x22]1803dd5f3592d86.png[/img]
B: Zn[img=17x22]1803dd5f3592d86.png[/img]
C: Ca[img=17x22]1803dd5f3592d86.png[/img]
D: S[img=17x22]1803dd5f5062b08.png[/img]
举一反三
- 下列各离子的电子排布式哪个是18电子构型。( ) 未知类型：{'options': ['Fe[img=17x22]17de8816ec44797.png[/img]', 'Zn[img=17x22]17de8816ec44797.png[/img]', 'Ca[img=17x22]17de8816ec44797.png[/img]', 'S[img=17x22]17de8816f8bad0a.png[/img]'], 'type': 102}
- 设总体X的分布律为P(X=0)=θ, P(X=1)=P(X=2)=(1-θ)/2，其中0<θ<1为待估未知参数。设[img=101x23]1802d3c6e1c13c2.png[/img]是简单随机样本。令[img=114x27]1802d3c6e985317.png[/img],[img=17x22]1802d3c6f1a9682.png[/img]为[img=101x23]1802d3c6e1c13c2.png[/img]中0所占的比例, 则以下哪个说法正确的？ A: [img=17x22]1802d3c702e42ee.png[/img]比[img=17x22]1802d3c70bb0618.png[/img]更有效 B: [img=17x22]1802d3c70bb0618.png[/img]和[img=17x22]1802d3c702e42ee.png[/img]都是[img=9x19]1802d3c72407a68.png[/img]的相合估计 C: [img=17x22]1802d3c70bb0618.png[/img]比[img=17x22]1802d3c702e42ee.png[/img]更有效 D: [img=17x22]1802d3c70bb0618.png[/img]是相合估计, [img=17x22]1802d3c702e42ee.png[/img]不是相合估计 E: [img=17x22]1802d3c70bb0618.png[/img]不是相合估计, [img=17x22]1802d3c702e42ee.png[/img]是相合估计 F: [img=17x22]1802d3c70bb0618.png[/img]， [img=17x22]1802d3c702e42ee.png[/img]都不是相合估计 G: [img=242x46]1802d3c7710420a.png[/img]
- 原电池（-）Pt︱Fe[img=17x22]1803dd54de61136.png[/img](1 mol·L[img=17x22]1803dd54e7299c0.png[/img]),Fe[img=17x22]1803dd54f0030fb.png[/img](1 mol·L[img=17x22]1803dd54fa39c0d.png[/img])‖Ce[img=17x22]1803dd5502f9d6b.png[/img]( mol·L[img=17x22]1803dd550b82a7d.png[/img]) ,Ce[img=17x22]1803dd55130efd2.png[/img]( mol·L[img=17x22]1803dd551af174c.png[/img]) ︱Pt(+)的电池反应是( )。 A: Ce[img=17x22]1803dd552375aee.png[/img] + Fe[img=17x22]1803dd552ca7541.png[/img] = Ce[img=17x22]1803dd5534dbdef.png[/img] + Fe[img=17x22]1803dd553dc33d1.png[/img] B: Ce[img=17x22]1803dd552375aee.png[/img] + Fe[img=17x22]1803dd553dc33d1.png[/img] = Ce[img=17x22]1803dd5534dbdef.png[/img] + Fe[img=17x22]1803dd552ca7541.png[/img] C: Ce[img=17x22]1803dd5534dbdef.png[/img] + Fe[img=17x22]1803dd553dc33d1.png[/img] = Ce[img=17x22]1803dd552375aee.png[/img] + Fe[img=17x22]1803dd552ca7541.png[/img] D: Ce[img=17x22]1803dd5534dbdef.png[/img] + Fe[img=17x22]1803dd552ca7541.png[/img] = Ce[img=17x22]1803dd552375aee.png[/img] + Fe[img=17x22]1803dd553dc33d1.png[/img]
- 3. 三阶行列式D=[img=110x71]18039d1f1b55d53.png[/img]= A: 5 B: 17 C: 22 D: 7
- 加入氨水即可进行分离的一组离子为( )。 A: Al[img=17x22]1803dd504e33cc2.png[/img]和Zn[img=17x22]1803dd5057444e5.png[/img] B: Cu[img=17x22]1803dd50603b3f0.png[/img]和Ag[img=11x21]1803dd50694f4ca.png[/img] C: Cd[img=17x22]1803dd507214d93.png[/img]和Ni[img=17x22]1803dd507b08b48.png[/img] D: Fe[img=17x22]1803dd50839b07f.png[/img]和Al[img=17x22]1803dd508caf916.png[/img]