Question

Write the complete symbol for
(i) the nucleus with atomic no. 56 and mass no. 138
(ii) the nucleus with atomic no.26 and mass no. 55
(iii) the nucleus with atomic no.4 and mass no. 9


Answer only if you know correctly. Don't answer anything irreleventaly​

Answer 1

Answer:

U know the answer of first

Explanation:

Barium

Answer 2

Answer:

1. Barium(Ba)
2. Manganese (Mn)
3. Beryllium (Be)