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Density

Which one is ...

Question

Which one is of the following is the lightest transition element?

A

S c

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B

T i

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C

H g

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D

F e

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Solution

The correct option is A $S c$
Scandium $(S c)$ is the lightest transition element. It is the first element in the $3 d$ transition series. Among the transition elements, $S c$ has the lowest density.

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Q. The elements of 3d transition series are given as:

\begin{matrix} S c & T i & V & C r & M n & F e & C o & N i & C u & Z n \end{matrix}

Answer the following:
(i) Write the element which is not regarded as a transition element. Give reason.
(ii) Which element has the highest m.p.?
(iii) Write the element which can show an oxidation state of +1.
(iv) Which element is a strong oxidizing agent in +3 oxidation state and why?

Q. The elements of 3d transition series are given as:

\begin{matrix} S c & T i & V & C r & M n & F e & C o & N i & C u & Z n \end{matrix}

Answer the following:
(i) Write the element which is not regarded as a transition element. Give reason.
(ii) Which element has the highest m.p.?
(iii) Write the element which can show an oxidation state of +1.
(iv) Which element is a strong oxidizing agent in +3 oxidation state and why?

Q. Count the total number of transition elements among the following.

C u, F e, T c, M o, H g, A g, C d, A u

Q. Number of elements from the following which are not transition elements is:

Z r, C o, C d, H g, A u, C u

Q. The elements of the three transition series of the d - block are given below:

\begin{matrix} S c & T i & V & C r & M n & F e & C o & N i & C u & Z n Y & Z r & N b & M o & T c & R u & R h & R d & A g & C d L a & H f & T a & W & R e & O s & I r & P t & A u & H g \end{matrix}

In any transition series, as we move form left to right, the d - orbitals are progressively filled and their properties vary accordingly.
Which element do you expect to have the smallest atomic radius?

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