The Energy of the First Level in an Atom Is

The energy of the first level in an atom is 2.2×10⁻¹⁸ J,and the energy of the second energy level is 1.6×10⁻¹⁸ J.What is the energy of the photon that is emitted if an electron moves from the second level to the first?

A) 3.5×10⁻³⁶ J
B) 6.0×10⁻¹⁹ J
C) 3.5×10⁻¹⁸ J
D) 6.0 ×10⁻¹⁸ J