Do we use mass of H or mass of proton?

Somebody asked we several days ago regarding the use use mass defect formula. In Zm_H do we use the mass of hydrogen always, or use the unified mass of proton?
View this ppt presentation, regarding the issue.

mass of H or p+

Electron capture or positron emission?

Regarding to the latest test you guys took on Nuclear Physics, question 9 states that ⁶⁴Cu decays into ⁶⁴Ni isotope by means of positron emission (Schaum’s Outlines’ Applied Physics 4th Edition). But if you pay a visit to webelements at this hyperlink you’ll see that ⁶⁴Cu decays into ⁶⁴Ni by means of electron capture. Which one is correct? I don’t know for sure, butI know that whether by positron emission or electron capture, both type of decay would resulted in proton being converted to neutron.

RADIOACTIVITY

Yesterday we covered the last parts on nuclear reactions – namely fission and fusion process. Today we proceed with the last topic in this chapter: Radioactivity literally means the spontaneous emission of particles and/or energy from atomic nuclei. As a result, energy is lost/liberated.

Or, you may download it HERE. (click me!click me!click me!)
To Fara and Farhan, thanks for pointing out the mistakes in the notes.