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NEET UG CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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The first ionization energy of magnesium is smaller as compared to that of elements

X

and

Y

, but higher than that of

Z

. The elements

X

Y

and

Z

, respectively, are

View answer and explanation

Correct option: C

argon, chlorine and sodium

Option C is correct because ionization energy generally increases across a period and decreases down a group. Argon and chlorine have higher ionization energies than magnesium, while sodium has a lower ionization energy.

More Questions from CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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The elements with zero electron affinity are S-I:

\mathrm{Cu}^{+2}

paramagnetic.

S-II: All the orbitals present in

\mathrm{Cu}^{+2}

ion are doubly occupied. Which of the following is the most electropositive element? The law of Octaves is not applicable to: Assertion (A): Mendeleev's arranged elements in horizontal rows and vertical columns.
Reason (R): Mendeleev's ignored the order of atomic weight thinking that the atomic measurements might be incorrect. Which of the following electronic configuration does not belong to same block as others?