指出下列元素的名称和原子序数,写出其核外电子排布式。
推荐回答(5个)
(1)名称是:氩 原子序数是:18 排列是1S2 2S2 2P6 3S2 3P6
(1)氩 18 1s2 2s2 2p6 3s2 3p6 (2)氧 8 1s2 2s2 2p4 (3) 砷 33 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p3 (4) 铬 24 1s2 2s2 2p6 3s2 3p6 3d5 4s1 或 锰 25 1s2 2s2 2p6 3s2 3p6 3d5 4s2
上面第二个问题
溴35 1s2 2s2 2p6 3s2 3p63d104s24p5
1、18号——氩,1s2 2s2 2p6 3s2 3p6
2、35号——溴,1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5,溴为常温下唯一的液态非金属。
3、33号——砷,1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3,4p半充满即4p5.
4、3d半充满即3d5,根据洪特规则,有2个。
①24号——铬,1s2 2s2 2p6 3s2 3p6 4s1 3d5
②25号——锰,1s2 2s2 2p6 3s2 3p6 4s2 3d5
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