Question

ma poate ajuta cineva la chimie va ROOOOG? Is bata si imi trebe pt tema (si primesc si nota..)
Imi trebuie doar cele incercuite.

Answer 1

21 a) 12 electroni 12 protoni

12neutroni

B)sarcina electrica +2

C)0,025*6,023*10^23

D) 1s2 2s2 2p6 3s2

E)3*6.023*10^23

F)0,012