141. One Fermi is equal to 10^–15 metre. The radius of a proton is 1.3 Fermis. Write the radius of a proton in metres in standard form. 141. One Fermi is equal to 10^–15 metre. The radius of a proton is 1.3 Fermis. Write the radius of a proton in metres in standard form. August 1, 2021 Category: Chapter 12 - Exponents and Powers , Maths , NCERT Class 8 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related