Question

Calculati numarul protonilor si al neutronilor pentru elementele cu numerele
a) atomice 6, 11, 20
b) cu sarcina nucleului +8, +17, +19, +35.
c) Li, P, Cu, K.

Answer 1

a).

$Z=6\implies\ ^{^{12}}_{_{6}}C\rightarrow\ 6p^+\ ,\ 6n^0\ ,\ 6e^-\\\\Z=11\implies\ ^{^{23}}_{_{11}}Na\rightarrow\ 11p^+\ ,\ 12n^0\ ,\ 11e^-\\\\Z=20\implies\ ^{^{40}}_{_{20}}Ca\rightarrow\ 20p^+\ ,\ 20n^0\ ,\ 20e^-$

b).

$q_{_0}=+8\implies\ ^{^{16}}_{_{8}}O\rightarrow\ 8p^+\ ,\ 8n^0\ ,\ 8e^-\\\\q_{_0}=+17\implies\ ^{^{35}}_{_{17}}Cl\rightarrow\ 17p^+\ ,\ 18n^0\ ,\ 17e^-\\\\q_{_0}=+19\implies\ ^{^{39}}_{_{19}}K\rightarrow\ 19p^+\ ,\ 20n^0\ ,\ 19e^-\\\\q_{_0}=+35\implies\ ^{^{80}}_{_{35}}Br\rightarrow\ 35p^+\ ,\ 45n^0\ ,\ 35e^-$

c).

$^{^{7}}_{_{3}}Li\rightarrow\ 3p^+\ ,\ 4n^0\ ,\ 3e^-\\\\^{^{31}}_{_{15}}P\rightarrow\ 15p^+\ ,\ 16n^0\ ,\ 15e^-\\\\^{^{64}}_{_{29}}Cu\rightarrow\ 29p^+\ ,\ 35n^0\ ,\ 29e^-\\\\^{^{39}}_{_{19}}K\rightarrow\ 19p^+\ ,\ 20n^0\ ,\ 19e^-$