MCQ
The general outer electronic configuration of 3d transition elements is ____________.
- A$3 d^{1-10} 4 s^1$
- B$3 d^{1-10}$
- ✓$3 d^{1-10} 4 s^2$
- D$3 d^{1-5} 4 s^2$
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Mortality: No. of deaths in a population during a given period:: Emigration: ____________.
