Answer:
0.826%
Step-by-step explanation:
The Rydberg constant = 2.178 × [tex]10^{-18}[/tex] J.
students record = 2.16 x [tex]10^{-18}[/tex]J.
error = 0.018 x [tex]10^{-18}[/tex]J.
Percentage error = [tex]\frac{error}{actual measurement}[/tex] x 100
= [tex]\frac{ 0.018 * 10^{-18} }{2.178 * 10^{-18} }[/tex] x 100
= 0.826%