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Identify the correct statement...

Identify the correct statement

A

Filling of 5d orbital begins with Hf in 5th period

B

Filling of 4f orbital begins with Ce in 6th period

C

Filling of 5d orbital begins with La in 5th period

D

Filling of 4f orbital begins with La in 6th period

Text Solution

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The correct Answer is:
D
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AAKASH SERIES-PERIODIC CLASSIFICATION-OBJECTIVE EXERCISE - 2 (PERIODIC CLASSIFICATION)
  1. Which of the following is an alloy of non-transition elements?

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  2. Common oxidation state of elemental transition metal is

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  3. Configuration that does not denote a transition element

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  4. An element of 5f-series but has no electrons filled in 5f-sub shell

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  5. An element has 18 electrons in the outer most shell. The element is

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  6. Element with electronic arrangement [Ar]3d^24s^2 belongs to

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  7. Number of outer shells partially filled for representative elements

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  8. Which of the following pairs has both members from the same group of t...

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  9. The elements with atomic number 10, 18, 36, 54 and 86 are all

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  10. Among the following, the number of elements showing only one non-zero ...

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  11. Following are some statements about modern periodic table i) It con...

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  12. The atomic number of the element which is not included in the main bod...

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  13. Match the Column {:("Column - I ","Column - II "),("a) Po ","i) Liqu...

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  14. Zinc is not considered as a transition metal because

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  15. The electronic configuration of an element 'X', is 1s^2 2s^2 2p^6 3s^2...

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  16. The IUPAC name of „Bh is

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  17. Number of unpaired electrons in Gd(Z =64) and the net electrons spin a...

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  18. Identify the correct statement

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  19. The following are some statements about transition elements i) IIB g...

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  20. An element with a mass number of 81 contains 31.7% more neutrons as co...

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