Classification of Elements and Periodicity in Properties

Which among the following electronic configurations belong to main group elements?
A. \([\mathrm{Ne}]3{\mathrm{s}}^{1}\)
B. \([\mathrm{Ar}]3{\mathrm{d}}^{3}4{\mathrm{s}}^{2}\)
C.\([\mathrm{Kr}]4{\mathrm{d}}^{10}5{s}^{2}5{\mathrm{p}}^{5}\)
D. \([\mathrm{Ar}]3{\mathrm{d}}^{10}4{\mathrm{s}}^{1}\)
E. \([\mathrm{Rn}]5{\mathrm{f}}^{0}6{\mathrm{d}}^{2}7{\mathrm{s}}^{2}\)

Choose the correct answer from the option given below :

[NEET 2025]

Arrange the following elements in increasing order of electronegativity:
\(\mathrm{N},\mathrm{O},\mathrm{F},\mathrm{C},\mathrm{Si}\)

Choose the correct answer from the options given bélow:

[NEET 2024]

The correct decreasing order of atomic radii \(( pm )\) of \(Li , Be , B\) and \(C\) is

[Re-NEET 2024]

Arrange the following elements in increasing order of first ionization enthalpy:

\(\mathrm{Li},\mathrm{Be},\mathrm{B},\mathrm{C},\mathrm{N}\)

Choose the correct answer from the options given below

[NEET 2024]

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:

Assertion A: The energy required to form \({\mathrm{Mg}}^{2+}\) from Mg is much higher than that required to produce \({\mathrm{Mg}}^{+}\).

Reason R: \({\mathrm{Mg}}^{2+}\) is small ion and carry more charge than \({\mathrm{Mg}}^{+}\).

In the light of the above statements, choose the correct answer from the options given below:

The five successive ionization energies of an element are 800, 2427, 3658, 25024 and 32824 kJmol^-1 respectively. The number of valence electrons is:

Which of the following statements are not correct?

(A) The electron gain enthalpy of \(F\) is more negative than that of \(Cl\)
(B) Ionization enthalpy decreases in a group of periodic table
(C) The electronegativity of an atom depends upon the atoms bonded to it.
(D) \(Al _2 O _3\) and \(NO\) are examples of amphoteric oxides.

Choose the most appropriate answer from the options given below: [JEE Main 2023, 13 Apr (Shift 1)]

The correct order of metallic character is: [JEE Main 2023, 10 Apr (Shift 2)]

The correct order of acidic strength is:

Element with electronic configuration \(1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^{6}3{\mathrm{d}}^{10}4{\mathrm{s}}^{2}4{\mathrm{p}}^{6}4{\mathrm{d}}^{10}5{\mathrm{s}}^{2}5{\mathrm{p}}^{3}\) belongs to the following group of the periodic table

Ionic radii are

The correct order of electronegativity for given elements is:

[JEE Main 2023, 8 Apr (Shift 1)]

The element expected to form largest ion to achieve the nearest noble gas configuration is

[NEET 2023]

For the second period elements the correct increasing order of first ionization enthalpy is

[NEET 2019]

In the sixth period, the orbitals that are filled are:

[JEE Main 2020, 5 Sep (Shift 1)]

The acidic, basic and amphoteric oxides, respectively, are:

[JEE Main 2020, 9 Jan (Shift 1)]

Outermost electronic configuration of four elements \(A , B , C , D\) are given below:
(A) \(3 s^2\)
(B) \(3 s^2 3 p ^1\)
(C) \(3 s^2 3 p ^3\)
(D) \(3 s^2 3 p ^4\)

The correct order of first ionization enthalpy for them is: