A electron in a lithium atom ( nucleus) is from the nucleus

PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

2s

electron in a lithium atom (

+3e

nucleus) is

1.60\,\text{\AA}

from the nucleus. A

2s

electron in a beryllium atom (

+4e

nucleus) is

1.00\,\text{\AA}

from its nucleus. Using

k = 8.99\times10^{9}\,\text{N}\cdot\text{m}^2\!\big/\!\text{C}^2

and

e = 1.60\times10^{-19}\,\text{C}

, calculate the percent increase in the magnitude of the attractive force experienced by the

2s

electron in beryllium compared with lithium.