Question: do russian and ukrainian use the same alphabet

Answer: No, Compared to other Cyrillic alphabets, the modern Ukrainian alphabet is the most similar to those of the other East Slavic languages: Belarusian, Russian, and Rusyn. It has retained the two early Cyrillic letters і (i) and izhe (и) to represent related sounds /i/ and /ɪ/ as well as the two historical forms e (е) and ye (є). Unique letters are these: