Which of the following elements is man-made?
- A$Ra$
- B$Fr$
- C$Rn$
- D$Lr$
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In a transition series,with an increase in atomic number,the paramagnetism:
Which element of the $3d$-series has the highest third ionisation enthalpy?
Which of the following ions is colourless in solution?
On what ground can you say that scandium $(Z=21)$ is a transition element but zinc $(Z=30)$ is not?
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View SolutionOut of $Cu_{2}Cl_{2}$ and $CuCl_{2}$,which is more stable and why?
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