Question

Complete each nuclear equation. (Give all nuclei in the form A X Z .) a. 77 Rb 37 → + 0 e +1 b. 251 No 102 → + 4 He 2 c. 66 Cu 29 → + 0 e −1

Answer 1

; that means A is Atomic number & Z is a mass number.

N.B- i)when (positron) decay atomic number goes Down by one and mass number unchenged.

ii)when (electron) decay atomic number goes Up by one and mass number unchenged.

so...

a) ;positron decay so atomic nuber goes down one.36 atomic number is Kr

b) ; positron decay.atomic number down by one .so 101 atomic number is Md

c) ; electron emissions (called Beta emissions).atomic number up by one.so 30 atomic number is Zn