Thảo Nguyên Đoàn18 tháng 7 2016 lúc 17:17
p: hạt proton=electron
n: hạt notron
{2(pA+pB)+(nA+nB)=1422(pA+pB)−(nA+nB)=42" role="presentation" style="box-sizing: border-box; display: inline; line-height: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">{2(pA+pB)+(nA+nB)=1422(pA+pB)−(nA+nB)=42{2(pA+pB)+(nA+nB)=1422(pA+pB)−(nA+nB)=42
⇔{pA+pB=46nA+nB=50" role="presentation" style="box-sizing: border-box; display: inline; line-height: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">⇔{pA+pB=46nA+nB=50⇔{pA+pB=46nA+nB=50
Hạt mang điện của B nhiều hơn A:
⇔2(pB−pA)=12⇒pB−pA=6" role="presentation" style="box-sizing: border-box; display: inline; line-height: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">⇔2(pB−pA)=12⇒pB−pA=6⇔2(pB−pA)=12⇒pB−pA=6
Từ 3 phương trình trên:
⇒pA=20pB=26" role="presentation" style="box-sizing: border-box; display: inline; line-height: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">⇒pA=20pB=26