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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

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The correct Answer is:
B
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AAKASH SERIES-PERIODIC TABLE-OBJECTIVE EXERCISE -3
  1. The IUPAC name of ""(104)Rf is

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  2. The IUPAC name of ""(107)Bh is

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  3. Screening constant depends upon A) Number of inner shells B) Numbe...

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  4. Screening constant of Be is 2.05 and that of B is

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  5. Write any two properties which are decreased from top to bott...

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  6. Screening by inner electrons will be more effective in

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  7. Correct order of first ionisation potentials

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  8. In a period from left to right A) nuclear charge increases B) eff...

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  9. Relation between oxidation numbers and electronegativity is given by

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  10. Screening effect influences A) atomic radius B) Ionisation enthal...

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  11. {0} is a set contains the element……..

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

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  13. For the process X((g)) + e^(-) rarr X((g))^(-), Delta H =x and X(g)^...

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  14. Some statements are given regarding nature of oxides (i) In second ...

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  15. When an electron adds on F atom, It becomes

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  16. On going down a main subgroup in the periodic table (example Li to Cs ...

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  17. Identify the correct statement

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  18. Identify the correct order in which the ionic radius of the following ...

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  19. The atomic radius decreases in a period due to

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

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