第二电离能最大的原子,应该具有的电子构型是
A: 1s22s22p5
B: 1s22s22p6
C: 1s22s22p63s1
D: 1s22s22p63s2
A: 1s22s22p5
B: 1s22s22p6
C: 1s22s22p63s1
D: 1s22s22p63s2
举一反三
- 试判断原子态:1s1s3S1,1s2p3P2,1s2p1D1,2s2p3P2中,下面哪组是存在的? A: 1s1s3S1,1s2p3P2; B: 1s2p3P2,1s2p1D1; C: 1s2p3P2,2s2p3P2; D: 1s1s3S1,1s2p1D1;
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- 高P/S值是指() A: P/S≥1 B: P/S≤1 C: P/S>1 D: P/S>0.5
- 假如集合 S={ 1, 2, 3, 4 },后面 5 个命题中,哪些是正确的?ⅰ) { {2} }⊆P(S),ⅱ) { 1, 3 }⊆P(S),ⅲ) { 1, 3 }∈P(S),ⅳ) { {2, 4} }⊆P(S),ⅴ) { 4 }⊆P(S)
- 以下VBA程序运行的结果是( ) Public Sub Form_Click() Dim s As Integer s = 0 For i = 1 To 2 s = 1 For j = i To 3 s = s + i * j Next j Next i MsgBox "s=" &; s End Sub A: 11 B: 18 C: 22 D: 7