Question

An element X has mass number 31 and proton number is 16. What will be the formula of compound of this element with ferric radical?

Answer 1

Atomic number = Proton number = 16

Thus, Electronic configuration = 2, 8, 6

Hence, the Element is Sulphur( symbol 'S')

Thus, it makes a formula Fe2S3.

Answer 2

Answer:

Fe2 (so4) 3 is the correct and but the questions atomic mass should be 32 and x is sulfur