1. Atom-molekulyar ta’limot. Kimyoning dastlabki tushunchalari. Molekula bu…

6. Yadrosida 9 ta proton va 10 ta neytron bo’lgan elementni tanlang. A) fosfor B) kalsiy C) ftor D) kaliy

7. Tartib raqami 35 bo’lgan element atomining nisbiy atom massasi 80 bo’lsa, uning yadrosida nechta neytron bor? A) 45 B) 40 C) 35 D) 46

8. yadrosidagi neytron va protonlar sonini hisoblang. A) 143 va 92 B) 145 va 90 C) 143 va 90 D) 145 va 92

9. Tellur atomi tarkibidagi nuklonlar sonini hisoblang .( ) A) 52p, 52n B) 52n, 52e C) 52p, 76n D) 76p, 52n

10. Quyidagi element atomlaridan qaysilarida elektronlar va neytronlar soni o’zaro teng bo’ladi? 1) ftor; 2) geliy; 3) xrom; 4) natriy; 5) azot; 6) magniy; 7) uglerod; 8) litiy; 9) kremniy A) 1,2,5,6,9 B) 2,3,5,6,7 C)3,4,5,6,8 D) 2,5,6,7,9

11. Vodorodning 3 ta izotopi bor. Ularning yadrosidagi neytronlar sonini (atom massasi ortib borish tartibida) aniqlang? A) 0,1,2 B) 1,2,3 C) 1,1,2 D) 1,2,2