Which of the following ions has an electron configuration...
Which of the following ions has an electron configuration different from the other?
17CI-
8O2-
12Mg2+
13AI3+
Correct answer is A
\(_{17}\)Cl\(^-\) = 18 electrons = 2, 8, 8
\(_{12}\)Mg\(^{2+}\), \(_{8}\)O\(^{2-}\) and \(_{13}\)Al\(^{3+}\) all have 10 electrons = 2, 8.
Ammonium chloride can be separated from its mixture with common salt by ...
When iron is exposed to moist air, it gradually rusts. This is due to the formation of? ...
The molecular shape and bond angle of water are respectively ...
The oxide that remains unchanged when heated in hydrogen is? ...
Which of the following mixtures would result in a solution of pH greater than 7?...
Which of the following processes occur during fractional distillation of petroleum? ...
When an acidic solution is diluted, what happens to its pH? ...
When air is passed through potash and then pyrogallol, the components are noble gases ...