1s2 2s22p6 3s2 3p6 4s2 3d2
1s2 2s22p6 3s2 3p6 4s2 3d1
1s2 2s22p6 3s2 3p6
1s2 2s22p6 3s2 3p6 3d2
Correct answer is D
\(_{22}X^{2+}\) has 22 electrons but has been ionized to 2+ by giving off 2 electrons. Hence, the ion \(_{22}X^{2+}\) has 20 electrons.
The electronic configuration = 1s\(^2\) 2s\(^2\) 2p\(^6\) 3s\(^2\) 3p\(^6\) 3d\(^2\)
the general trend for the first-row transition metals is that they lose electrons from their 4s orbitals first before 3d when forming ions. but this is not true for chromium and copper due to stability related to half-filled or completely-filled 3d orbitals
A positive reaction to Fehling's test indicates the presence of ...
147N + X → 178O + 11 H. In the above reaction, X is a?...
The aqueous solution which has pH > 7 is ...
The principle of column chromatography is based on th ability of the constituents to ...
Elements X and Y have electronic configurations 1s\(^2\)2s\(^2\)2p\(^4\) and 1s\(^2\)2s\(^2\)2p...
What is the atomic number of Oxygen? ...
Which of the following substances causes the depletion of the ozone layer in the atmosphere? ...