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The elements in which electrons are prog...

The elements in which electrons are progressively filled in 4f-orbitals are called:

A

actinoids

B

transition elements

C

lanthanoids

D

halogens

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The correct Answer is:
C
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MODERN PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -NCERT FILE (NCERT EXEMPLAR PROBLEMS) (MCQs-I)
  1. Consider the isoelectronic species, Na^(+),Mg^(2+),F^(-) and O^(2-). T...

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  2. Which of the following is not an actinoid?

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  3. The order of screening effect of electrons of s, p, d and f orbitals o...

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  4. The first ionisation potential of Na,Mg,Al and Si are in the order

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  5. The electronic configuration of gadolinium (At. No 64) is:

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  6. The statement that is not correct for periodic classification of eleme...

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  7. Among halogens, the correct order of amount of energy released in elec...

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  8. The period number in the long form of the periodic table is equal to

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  9. The elements in which electrons are progressively filled in 4f-orbital...

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  10. Which one of the following is correct order of the size of iodine spec...

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  11. The formation of oxide ion O^(2-)(g) from oxygen atom requires first a...

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  12. In the modern periodic table, elements are arranged in order of increa...

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  13. Comprehension given below is followed by some multiple choice question...

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  14. In the modern period table, elements are arranged in order of increasi...

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  15. In the modern periodic table, elements are arranged in order of increa...

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  16. In the modern periodic table, elements are arranged in order of increa...

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  17. Electronic configuration of four elements A, B ,C and D are given belo...

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