Question

I will mark as brainliest
WHOEVER answer's correct ​

Answer 1

Answer:

hidfkngujbhincgn ...........

Answer 2

Note: i think it is 19 as superscipt in x
1) atomic number-9 mass number-19
2)protons=electrons =atomic number=9
Neutrons=mass number-atomic number=19-9=10
3) ec=2,7
4)7