Do protons and electrons have same mass?

If a proton and electron have the same de Broglie wavelength, then

When is no. of protons and electrons same in an atom ?

A proton and an electron have same velocity. Which one has greater de-Broglie wavelength and why?

If a proton and an electron have the same kinetic energy, which has the longer de Broglie wavelength?

A proton and an electron have same kinetic energy. Which one has greater de-Broglie wavelength and why ?

Which of the following is associated with a de Brogle wave of langer wavelength -a proton or an electron having same velocity ?

A proton and an electron are accelerated by same potential difference have de-Broglie wavelength lambda_(p) and lambda_(e ) .

Q 4 Two atoms are said to be isobars if. * (a) they have same atomic number but different mass number. (b) they have same number of electrons but different number of neutrons (c) they have same number of neutrons but different number of electrons. (d) sum of the number of protons and neutrons is same but the number of protons is different.

A proton of mass m_p and electron of mass m_e are accelerated through the same potential the ratio of debroglie wavelength of electron to that of proton is