The correct order of increasing first ionization energy is

Important Questions on Classification of Elements and Periodicity in Properties

MEDIUM

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 41

The group that has the species correctly listed in the order of decreasing radius is :

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 42

The number of valence electrons in an atom with the configuration $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^2$ is:

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 43

The outer most electronic configuration of the most electronegative element is:

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 45

The first four ionisation energy values of metal are $191, 587, 872$ and $5962 \mathrm{kcal}/\mathrm{mol}$ respectively. The number of valence electrons in the element is:

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 47

In which element shielding effect is not possible?

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 48

Poor shielding of nuclear charge by $\mathrm{d}$ or $\mathrm{f}$-orbital electrons is responsible for which of the following facts?

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 50

Most stable oxidation state of Thallium is $+\mathrm{n}.$ What is the Value of $\mathrm{n}.$

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 51

Total number of elements which have more ionization energy as compare to their next higher atomic number elements. $\mathrm{Li}, \mathrm{Be}, \mathrm{C}, \mathrm{N}, \mathrm{O}, \mathrm{F}, \mathrm{Ne}$.