26.) Elementning elektron formulasining oxiri ...4s34p2 bilan tugaydi. Shu elementning tartib raqamini aniqlang. A) 33 B) 30 C) 28 D) 25
27. Temir atomining d-qobiqchasida nechta elektron bor? [Z(Fe) = 26]. A) 4 B)10 0 )1 4 D) 2 E) 6
28. Element atomlarining elektron qavatining "d" pog'onachasida eng ko'pi bilan nechta elektron bo'ladi? 1)2; 2) 6; 3)14; 4) 16; 5) 10. A) 5 B)1 C )2 D) 4 E) 3
29) Quyidagi elektron formulalardan qaysi biri mis atomiga tegishli? Misning tartib raqami 29.
A) 1 s22s22p63s23p63d104s2 B) 1s22s22p63s23p63d94s1 C) 1s22s22p63s23p63d64s2 D) 1s22s22p63s23p63d104s1 30 Tartib raqami 34 bo'lgan selen elementning Se-2 ionining elektron formulasini toping.
A) 1s22s22p63s23p64s23d14p4
B) 1s22s22p63s23p64s23d10 C) 1s22s22p63s23p64s23d8 D) 1s22s22p63s23p64s23d104p6 31. Elektron konfiguratsiyasi, 4s13d10 xolda tugallangan elementning tartib raqamini toping. A) 31 B) 27 C) 28 D) 30 E) 29
32. Elektron formulasi 1s22s22p2 va 1s22s22p4 bo'lgan elementlardan tashkii topgan kislota qoldig'i nomini aniqlang: A) nitrat B) nitrit C) karbonat D) sulfat