Question

What is the energy of an electron in the first energy level of hydrogen?

A. -1.089 × 10-18 J
B.-2.178 x 10-18 J
C.-4.356 x 10-18 J
D. -5.445 x 10-19 J

Answer 1

B

Step-by-step explanation:

hydrogen it's atomic number (Z) is

recall from the formular of Energy

E = -2.178 x 10-18/Z

= -2.178 x 10-18/1

E = -2.178 x 10-18