Answer:
Explanation:
from Bohr's equation,
E = -Z²R/n²
R = 13.6 eV
Z = atomic number of element
for 1s energy level n= 1
E = -(Z)² x (13.6)/(1)²
E = -13.6Z²
calculating the numerical for the 1s energy levels for He+ and Li2+
- for He+
E = -13.6 * (2)² = -54.4eV
- for Li2+
E = -13.6 * (3)² = -122.4eV
