Question

Question #3d849

Answer 1

I feel like the answer's already given
Sn is the symbol for tin
N is the last letter in tin
n is the second letter in the symbol
Thus Tin must be the answer, you sure the book, worksheet, teacher didn't mess up?

Answer 2

The symbol of tin, as all the elements, comes from the latin name of the element.

Explanation:

Tin is latin is "Stannum". So they chose the first and the fourth letter.