Answer
40,000 cm
Work Step by Step
Since the nucleus is 10,000 times smaller than the diameter of the atom, a nucleus of 4 cm means a diameter of 40,000 cm.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.