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anh làm chi tiết câu 2 thôi nhé, tại vì dài quá
2.
Ta có: \(\left\{{}\begin{matrix}p+e+n=92\\p=e\\p+e-n=24\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}2n=68\\p=e\\p+e+n=92\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}n=34\\p=e=z=29\end{matrix}\right.\)
\(\Rightarrow A=z+n=29+34=63\left(u\right)\)
\(KHNT:^{63}_{29}Cu\)
3.
Ta có: \(\left\{{}\begin{matrix}p+e+n=155\\p=e\\p+e-n=33\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}p=e=z=47\\n=61\end{matrix}\right.\)
\(\Rightarrow A=z+n=47+61=108\left(u\right)\)
\(KHNT:^{108}_{47}Ag\)
4.
Ta có: \(\left\{{}\begin{matrix}p+e+n=58\\p=e\\p+e-n=18\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}p=e=z=19\\n=20\end{matrix}\right.\)
\(\Rightarrow A=z+n=19+20=39\left(u\right)\)
\(KHNT:^{39}_{19}K\)
5.
Ta có: \(\left\{{}\begin{matrix}p+e+n=115\\p=e\\p+e-n=25\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}p=e=z=35\\n=45\end{matrix}\right.\)
\(\Rightarrow A=z+n=35+45=80\left(u\right)\)
\(KHNT:^{80}_{35}Br\)
6.
Ta có: \(\left\{{}\begin{matrix}p+e+n=40\\p=e\\p+e-n=12\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}p=e=z=13\\n=14\end{matrix}\right.\)
\(\Rightarrow A=z+n=13+14=27\left(u\right)\)
\(KHNT:^{27}_{13}Al\)
7.
Ta có: \(\left\{{}\begin{matrix}p+e+n=82\\p=e\\p+e-n=22\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}p=e=z=26\\n=30\end{matrix}\right.\)
\(\Rightarrow A=z+n=26+30=56\left(u\right)\)
\(KHNT:^{56}_{26}Fe\)
8.
Ta có: \(\left\{{}\begin{matrix}p+e+n=40\\p=e\\n-p=1\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}p=e=z=13\\n=14\end{matrix}\right.\)
\(\Rightarrow A=z+n=13+14=27\left(u\right)\)
\(KHNT:^{27}_{13}Al\)
9.
Ta có: \(\left\{{}\begin{matrix}p+e+n=108\\p=e\\n-p=9\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}p=e=z=33\\n=42\end{matrix}\right.\)
\(\Rightarrow A=z+n=33+42=75\left(u\right)\)
\(KHNT:^{75}_{33}As\)
10.
Ta có: \(\left\{{}\begin{matrix}p+e+n=34\\p=e\\n-e=1\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}p=e=z=11\\n=12\end{matrix}\right.\)
\(\Rightarrow A=z+n=11+12=23\left(u\right)\)
\(KHNT:^{23}_{11}Na\)
a) Ta có: \(\left\{{}\begin{matrix}p+e+n=155\\p=e\\p+e-n=33\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}p=e=47\\n=61\end{matrix}\right.\)
\(\Rightarrow A=p+n=47+61=108\left(u\right)\)
\(KHNT:^{108}_{47}Ag\)
b)
Ta có: \(\left\{{}\begin{matrix}p+e+n=95\\p=e\\\dfrac{p+n}{e}=\dfrac{13}{6}\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}p=e=30\\n=35\end{matrix}\right.\)
\(\Rightarrow A=p+n=30+35=65\left(u\right)\)
\(KHNT:^{65}_{30}Zn\)
c)
Ta có: \(\left\{{}\begin{matrix}p+n=80\\p=e\\n-p=10\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}p=e=35\\n=45\end{matrix}\right.\)
\(\Rightarrow A=p+n=35+45=80\left(u\right)\)
\(KHNT:^{80}_{35}Br\)
d)
Ta có: \(\left\{{}\begin{matrix}p+e+n=52\\p=e\\n-e=1\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}p=e=17\\n=18\end{matrix}\right.\)
\(\Rightarrow A=p+n=17+18=35\left(u\right)\)
\(KHNT:^{35}_{17}Cl\)
\(\begin{cases} 2Z_A+n_A=34\\ 2Z_A-n_A=10 \end{cases} ⇒ \begin{cases} Z_A=11 (Na)\\ n_A=12 \end{cases} \)
\(Z_A-Z_B=2 ⇒ Z_B=9 (F)\)
\(⇒\) Vậy hợp chất AB là NaF, thuộc loại liên kết ion, do Na, F lần lượt là kim loại và phi kim điểm hình.