For a proton to capture an electron to form a neutron and a neutrino (assumed massless), the electron must have some minimum energy. For such an electron the de Broglie wavelength in picometers is ______. (Specify your answer to two digits after the decimal point.)

For a proton to capture an electron to form a neutron and a neutrino (

1.	For a proton to capture an electron to form a neutron and a neutrino (assumed massless), the electron must have some minimum energy. For such an electron the de Broglie wavelength in picometers is ______. (Specify your answer to two digits after the decimal point.)
A.	3.20
B.	2.10
C.	2
D.	3.20
Answer» C. 2

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