ياليت احد يحللي الاسئله ارجوكم
1- the appendix lisits all known stable nuclides. are there any for which (Z< N)? why are such nuclides so rare (or absent

2-what happens to the atomic number and mass number of a nucleus when it
a- emits an alpha partical
b- emits an electron
c- emits a positron
d- captures an electron

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