Question

18.

An atomic mass unit (amu) has a mass equal to about _____.

A)1/2,000 that of a neutron

B)that of a proton

C)that of an electron

D)2,000 times that of a neutron

Answer 1

B) that of a proton
A proton and neutron both have the atomic mass of about 1 AMU, while an electron has a much smaller AMU