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Comparison of Lanthanides and Actinides

The point of ...

Question

The point of dissimilarity between lanthanides and actinides is:

A

three outermost shells are partially filled

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B

they show oxidation of

+ 3

( common)

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C

they are called inner transition elements

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D

they are radioactive in nature

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Solution

The correct option is D they are radioactive in nature
Lanthanides and actinides both are not radioactive. Except promethium all lanthanides are non-radioactive. While all actinides are radioactive.

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Similar questions

Q. Give one point of dissimilarity between lanthanides and actinides.

Q. Explain:
(i) Why do transition elements show variable oxidation state?
(ii) Give two differences between Lanthanide and Actinide.

Q. Statements that are true of d-and f-block elements are:
1. The colour of

K_{2} C r_{2} O_{7}

is due to d-d transition.
2. Actinides have larger number of oxidation states than lanthanides.
3. Tripositive ions of

P r (A t . N o . = 59)

T m (A t . N o . = 69)

have the same (green) colour.
4. Actinides have paramagnetic moments less than theoretically predicted values.

Q. A larger number of oxidation states are exhibited by the actinides than those by the lanthanides. The main reason being:

Q. Spot the mistakes in the given statements and correct them.
(a) Lanthanides and actinides are included in the main body of periodic table.
(b) Titanium, chromium and manganese are coinage elements.

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