\(\left\{{}\begin{matrix}P+N+E=16\\P=E\\P\le N\le1,5P\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}2P+N=16\\P\le N\le1,5P\end{matrix}\right.\\ \Leftrightarrow\left\{{}\begin{matrix}N=16-2P\\P\le16-2P\le1,5P\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}N=16-2P\\3P\le16\le3,5P\end{matrix}\right.\\ \Leftrightarrow\left\{{}\begin{matrix}N=16-2P\\4,571\le P\le5,333\end{matrix}\right.\\ \Leftrightarrow\left\{{}\begin{matrix}P=E=Z=5\\N=6\end{matrix}\right.\)
Kí hiệu nguyên tử X: \(^{11}_5B\)
Đúng 0
Bình luận (0)
