9. Aktiniy
Ac
225
89
yadrosida nechta neytron borligini aniqlang?
A)225 B)89 C)136 D)314
10. Atomning yadrosida 9 ta proton va 11 ta neytron bo‘lsa, shu
neytral atomning elektron qobig‘ida nechta elektron bor?
A)11 B)9 C)20 D)2
11.
Hg
200
80
da nechta proton va neytron bor?
A)80 ta proton, 200 ta neytron B)80 ta proton, 80 ta neytron
C)80 ta proton, 120 ta neytron D)200 ta proton, 80 ta neytron
12. Ksenon
Xe
140
54
yadrosida nechta proton va nechta neytron
mavjud?
A)54; 140 B)140; 54 C)86; 54 D)54; 86
13. Plutoniy
Pu
239
94
da nechta proton Z va neytron N bor?
A)Z=94; N=239 B)Z=94; N=145
C)Z=239; N=94 D)Z=145; N=94
14. Yadrosida 37 ta proton va 48 ta neytron bo‘lgan neytral atomda
nechta elektron bor?
A)48 B)37 C)20 D)11
15.
Ku
260
104
atomi yadrosida nechta proton (Z) va nechta neytron (N)
mavjud?
A)Z=260; N=104 B)Z=156; N=104
C)Z=156; N=156 D)Z=104; N=156
16. Atom yadrosida 14 ta proton va 16 ta neytron bo‘lgan neytral
atomda nechta elektron borligini toping?
A)6 B)8 C)14 D)2
17. Uranning Mendeleev jadvalidagi tartib raqami 92, yadrosining
massa soni 235. Uning yadrosida nechta neytron bor?
A)92 B)143 C)238 D)146