Classification of elements and periodicity in properties practice · Mixed difficulty

Atomic radii of inert gases are expressed in terms of

Maximum oxidation state (+8) is exhibited by

If Aufbau rule is not followed, K-19 will be placed in

Which of the following sequence regarding ionisation potential of coinage metal is correct:

Given below are two statement : One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: Size of $B{k^{3 + }}$ ion is less than $N{p^{3 + }}$ ion.
Reason R: The above is a consequence of the lanthanoid contraction.
In the light of the above statements, choose the correct answer from the options given below:

The atomic orbitals used for filling in sixth period of periodic table are

Among the following, basic oxide is:

E. N of the element A is ${E_1}$ and I.E is ${E_2}$. Hence, E. A will be

Which pair of elements belongs to the same period in periodic table

Which of the following cannot be isoelectronic

Which is the property of non-metal?

The formation of ${O}^{2-}(\mathrm{g})$ starting from ${O}(\mathrm{g})$ is endothermic by $603 \mathrm{~kJ} \mathrm{~mol}^{-1}$. If electron affinity of ${O}(\mathrm{g})$ is $-141 \mathrm{~kJ} \mathrm{~mol}^{-1}$, the second electron affinity of oxygen would be:

Which of the following belong to the category of transition metal

The energy required to convert all atoms present in $1.2 \mathrm{~g}$ magnesium to ${Mg}^{2+}$ ions if $\mathrm{IE}$, and $\mathrm{IE}_2$ of magnesium are $120 \mathrm{~kJ} \mathrm{~mol}^{-1}$ and $240 \mathrm{~kJ} \mathrm{~mol}^{-1}$ respectively

Of the following elements, which one has the highest electronegativity?

The formation of the oxide ion ${\mathrm{O}^{2 - }}\left( g \right)$ requires first an exothermic and then an endothermic step as shown below:
$\mathrm{O}\left( \mathrm{g} \right) + {e^ - } = {\mathrm{O}^ - }\left( \mathrm{g} \right);\mathrm{\;}\Delta H^\circ = - 142\mathrm{\;kJmo}{1^{ - 1}}$ ,
$\mathrm{O}{\left( \mathrm{g} \right)^ - } + {e^ - } = {\mathrm{O}^{2 - }}\left( \mathrm{g} \right);\Delta H^\circ = 844\mathrm{\;kJmo}{1^{ - 1}}$
This is because

$3 d$-transition series of elements starts with $\mathrm{Sc}$ and ends with $\mathrm{Zn}$. The electronic configuration of $\mathrm{Sc}$ and $\mathrm{Zn}$ are respectively.

Considering the elements $\mathrm{B}, \mathrm{C}, \mathrm{N}, \mathrm{F}$ and $\mathrm{Si}$, the correct order of their non-metallic character is

Which is mismatched regarding the position of the element as given below?

Which of the following acts sometimes as a metal and sometimes as a non-metal?

The element with electronic configuration $1{s^2}2{s^2}2{p^6}3{s^2}$ is

The set representing the correct order of first ionisation energy is

The property of attracting electrons by the halogen atoms in a molecule is called

Which is not a scale of measuring electronegativity?

Correct increasing order of first ionisation potential is

The $\mathrm{I}{\mathrm{P}_1},\mathrm{I}{\mathrm{P}_2},\mathrm{I}{\mathrm{P}_3},\mathrm{I}{\mathrm{P}_4},\mathrm{ and } \, {\mathrm{IP}_5}$ of an element are $7.1,\mathrm{ }14.3,\mathrm{ }34.5$, $46.8$,$162.2 \, \, \text{eV}$ respectively. The element is likely to be:

The species with radius less than that of neon is

Which is correct regarding the position of the element as given below?

Highest amount of energy will be required for the removal of the electron from

S-I: '$Be$' and '$Al$' have similar properties.
S-II: Cations of '$Be$' and '$Al$' have same polarizing power.